If you own a Diesel car, truck, motorhome, boat, tractor or generator, you
use WVO as fuel. Most of the time two tanks are used,
for WVO the other for petroleum diesel. Our
products use engine
coolant and electricity to heat the WVO.
Start on regular Diesel fuel, then once things are all warmed up
switch to WVO, and then you're drivin' for peanuts.
Or on peanut oil that is. Some vehicles
(mainly 77-85 Benz and a few other older IDI engines)
can operate on WVO 100% of the time as long as
you are in a reasonably warm climate.
Will 100% WVO work
in all Diesel engines?
Sorry but the answer is
no. If you
have a newer Diesel engine (late 1990's and
newer) and want to use WVO
we recommend using a mix (cocktail) of WVO and
pump diesel with our system.
What are the
environmental benefits of using WVO?
benefit is that sulfur (which causes acid rain) is eliminated
since WVO contains no sulfur. Co2 emissions
(which are blamed for global warming) are
nearly eliminated because WVO is a renewable
Emissions of other pollutants like HC and CO are reduced by
about 30% - 50% when compared to petroleum
Diesel. One of the most beneficial
reductions is that black smoke (particulate) is
significantly reduced by 50- 70%. Soot
from petroleum fueled Diesel engines is carcinogenic and can
cause serious respiratory problems.
Generally the engines Nox emissions remain unchanged.
How will my engine operate on WVO?
When you use WVO as fuel you'll notice your
engine will, run quieter, cooler, and make less
black smoke than when it is running on petroleum
WVO give me the same power as Diesel fuel?
Once the engine is
warmed up there is usually no distinguishable change in
performance. In fact some tests have shown a
small increases in power, but this can vary,
depends on the quality of WVO you are using. However WVO has less BTU's per volume than Petrolium diesel and therefore you could expect to see a decrease in your MPG by as much as 5%
Why should I use WVO?
This one is simple, using WVO can save you money
and it's much better for our environment than petroleum fuel. Our friend Bill commutes 220 miles a day in his
300D turbo Benz... That's 1,100 miles a week... over
50,000 miles per year... Using WVO saves him over $20.00 a day, $100.00 per
week, $400.00 per month, $4,800.00 per year!
For the price of just a few tanks of
diesel you could drive for free!
Why doesn't everyone
Using WVO is not for everyone. You will need to
collect the WVO, some time and people skills are
required. Some folks think used cooking oil is
offensive. We like to think of collecting WVO as
a money making opportunity. It usually take less
than 1 hour to gather over 100 gallons of WVO.
If you do the math that equates to $200 - $300
per hour for your effort. Also changing filters,
learning how to purge your fuel system, and
finding good WVO can be a little messy and takes
some time. WVO sometimes smells, but
then again not near as bad as petroleum Diesel. If you
are going to use WVO for fuel you must need
to learn the difference between
good and bad WVO and how to collect it properly. Finally you
really should take some time to understand how your
engine works. Although it is unlikely, there
can be some mechanical risks with using WVO as
fuel. Clogged injectors and sticking piston
rings are possibilities. Usually any mechanical
problems can be traced to using poor quality WVO,
or improper operation or installation.
Why use injector line heaters?
Remember there are two reasons for
heating the WVO. The first is to get it to flow through the supply lines and
pass through the filters but, the main
reason for heating the WVO is to provide
good atomization at the injector and
combustion in the cylinder. When the WVO is
hot the combustion is much more complete. So
while your WVO may be at 160-180 as it
enters the injection pump, temps can drop to
120 or lower by the time it gets to the
worsens in colder weather. As far as we know
we have the only system that address this basic
problem. Our WVO systems uses an electric resistance heater on the injector lines just prior to the
injectors. Our heater applies heat directly to the injector lines and heats them
to about 220 - 280F . This is hotter than anyone else's system. I can tell you this
really makes a huge difference, smoke is much
less at idle, power is improved even
emissions are much lower. Overall the
injectors stay cleaner longer. Using an electric heater is a
bit of a contradiction for us (we like to use coolant for heating) but our injector line heater applies heat directly
to the injector lines and only draws about 7 amps
(this is usually less than a pair of aftermarket driving lights) so there is
minimal additional load on the charging system. Let us
know if you have any questions.
Our theory on loop
return VS On Demand system.
The first thing to consider is
that engine manufacturers have spent many years
perfecting diesel engine injection systems.
These systems are specifically designed to use
Diesel fuel. Most stock diesel fuel systems
use a tank return to purge air air from the fuel
systems. Tank return systems generally
circulate many times the volume of fuel that is
being consumed by the engine. While circulation
is OK for Diesel circulating too much veg oil
can cause problems. If you are researching VO
fuel systems you will likely hear the term loop
return. This is a solution some folks came up
with to avoid circulating large volumes of VO
back to the fuel tank . The reason loop return
is often preferred is that it retains more heat
in the system under the hood instead of
returning the heat to the tank @ the rear of the
vehicle. it is also easier on the filters since
only the fuel being consumed by the engine
passes through them. The down side of a loop
return system is that if ANY air enters the
system it will often result in
the engine quitting or running poorly. To solve
this problem we advocate the use of
an on demand system. This system works much like
the fuel system on a carbureted gasoline engine.
It maintains fuel pressure on the IP but does
not circulate large volumes of fuel. As the fuel
is consumed it is replaced by new fuel. A small
orifice is used to purge air from the system.
This small volume
of flow back to the tank results in trapped air
being removed from the loop return system. I
hope you find this information useful. If you
have any questions just drop me a line.
Q: Tell me why
your system is better than Greasel or Greascar.
I get asked all the time to compare our
products to other WVO conversion kits. Tell my why your system
is better or best? At Fattywagons we really don't
like to talk bad about someone else's
products. We think it's better for you to
get the facts, then you can make good decisions
for yourself. That's why we're the only
company that provides links to other conversion suppliers web sites. We
encourage you to visit our competition and compare our products to theirs. We
don't want you as our customer because you think we are the only game in town.
We want you as our customer because you are informed and see that we offer some
of the best value and quality WVO products available. In other words, we want
you to feel good about your purchases with us. Compare our A-1 filter to the
competitions filters. We had to design and make it ourselves because there is
nothing else like it available. The filter inside is huge but the
housing is compact . The cartridge has several times the filtering area of most
other filters. Replacement elements are cheap and available (cost is about
$10.00 ea). We are also the only company that makes injector line heaters. Our
heaters heat the WVO right before the injectors. Most kit suppliers make a big deal about
getting the WVO up to temperature but they
don't address the heat losses that happen in the injector pump and injector
lines. Our aluminum hose in hose and Tanktherm work well for heating. We also
offer our 100 and 300 watt Electrotherm heater for folks who prefer using the
charging system for heating, which can sometimes make more sense when you need
heat before the engine gets warmed up. So you make the choice but I bet you
won't see a link on anyone else's site to ours anytime soon...
Its Erik from Santa
Cruz that you sent the single tank kit to for my
After installing my kit and doing all the work
on it I have realized that, however difficult it
seemed , it was actually very straight fwd and
simple. I ended up bolting instead of welding my
brackets in place allowing for easier
I have now logged a few hundred miles on my
single tank kit and am
loving it. Everything seems to be running fine.
Thanks so much for all the help you have given
me and the wonderful kit. I am a very satisfied
costumer and have a few people sold on your kits
I have been using
your injection line heater very successfully to
run veg oil since last summer. I didn't use a
heated fuel filter. Finally the weather here got
too cold for just the injection line heater.
Mine still works fine, but the weak link is
that once it gets really cold, the veg oil
quickly clogs my unheated fuel filter. I'm going
to switch to two tanks and run a tank heater and
heat exchanger on the fuel filter. I'm working
on that now, and will be ordering your tank
heater once I get my second tank. I might be
able to get by on one tank and a heated fuel
filter, but I'm sort of punch drunk on clogging
filters. Now I like the idea of being able to
switch back to regular diesel if things get too
cold, I get a clogged filter, or if things
otherwise go wrong.
I also want to mention that I drained the Veg
oil out of my attempted single tank system and
returned to straight diesel pending getting my
second tank system going. The past few mornings
have been icy cold. As an experiment I turned
on the injection line heaters to heat up the
lines before engaging the glow plugs. The
engine seems to start instantly! It is a
startlingly better start performance than with
just glow plugs. No more freezing weather
hesitation! The engines starts as though it has
been completely warmed up.
Just wanted you to know I'll be keeping the
injection line heaters in my system no matter
what. With the straight diesel, I turned off
the injection line heaters just after I got the
engine started. When running Veg oil. I'll keep
Sincerely, John Sheffield
By the way, I'm
really stoked on this heater! My injector tubes
finally hot and I swear the engine runs
stronger! It heats up
quickly, also, and I feel much better about
starting the engine in
the morning. I've been letting it heat for a
minute or two before
hitting the starter.
Sorry to have taken so long, but here (finally)
are some photos of my Fattywagons system on my
2000 F250 Ford 4x4. The WVO tank is a 26-gallon aluminum
tank from West Marine and I've enclosed it in an
insulated, pressure-treated-lumber box since I
plan to plow snow in sub-zero temperatures here
I installed the system at the end of August, and
as of this writing I've gone approximately 6,000
miles with no issues to speak of. I run about
5-10% diesel in my WVO tank for the summer/fall.
I'll bump that up a little for the winter, maybe
to 50/50. We'll see.
I get my WVO from six different restaurants,
half are Chinese and half are American
restaurants. I store the WVO in a 55-gal drum
and pump it through a 10-micron filter when
filling my truck's WVO tank. The original
10-micron filter that is part of the Fattywagon
system is still in use, and the filter's vacuum
gage still reads less than 5 inches of vacuum
from the fuel pump. My truck seems to run pretty
much the same on WVO as on diesel - no
noticeable change in power or fuel economy.
The truck warms up quickly, and I can switch
over to grease in about 2-3 miles of driving.
With the line-in-line fuel heater and insulated
WVO tank, I can shut the truck off for up to 3
hours without having to switch back to diesel.
As the weather cools that 3-hour window is
diminishing. Purging the grease for a shutdown
takes about 3-5 minutes - I switch over to
diesel about 3 miles from home, and I haven't
had any problems yet.
So... so far so good. I'm still crossing my
fingers that the long-term results will be as
good as the short-term. The Fattywagons system
is doing a fantastic job, and you're welcome
have current or potential customers contact me
if they have any questions.
Q: What is Diesel
Secret Energy (DSE) and what does it do and how
does it work?
Lately we have been
getting questions about DSE. Most folks want to
know how and why DSE makes WVO work without a
heating system. We purchased some DSE and are
waiting for our order to arrive. From what I
understand DSE may act as a thinning agent for
WVO? Once it arrives we'll mix some up with WVO
and do some testing for cold weather
performance. Even if you do decide to use DSE
you will still need to filter the WVO. You might
consider using our filter as you drive concept,
since filtering can be messy and takes time.
Also heating the WVO will help it flow through
the filters and an injector heater will still
improve combustion. Finally the real test of how
DSE works is finding out if cold WVO treated
with DSE will cause coking of the injectors over
time. This will require inspections over a few
years and thousands of miles of driving.
Q: One tank or two?
I was looking over your site and system and am
installing one on a '82 300SD that I have
I just had a couple of quick questions about the
Assuming that my thermostat is working properly,
typical warm up time for the WVO? How long
should one allow for
the purge before shutdown? During the purge
cycle, is some of
the WVO going back to the diesel tank? If yes,
Finally should I consider a one tank system?
Thanks for your time, Tony
I would suggest a one tank WVO system for the
Benz as long as
you live in relatively warm climate..
The upsides for the one tank system are:
No switching back and forth...
Cheaper and easier installation...
No second tank...
Must have good glow plugs to start even in warm
Must add at least 5% gasoline or 20% or higher
diesel in the
mix for cold weather operation.
Not recommended for DI engines or engines with a
pump...(GM, FORD, Dodge / Cummins and others)
Recommend injector inspection at time of install
inspections every 20K miles.
Time for warm up on the 2 tank system is usually
depending on the outside temps... Purge time is
usually about 1
minute. Yes, about one cup of WVO is sent back
to the Diesel tank each time you purge the
system. We always recommend replacing the
thermostat if the existing one is more than a
year or so old. The problem is not overheating
but under heating. Benz thermostats tend to let
the coolant leak past, thus not bringing the
engine up to temperature. A new / good
thermostat should take care of this problem and
heat the engine in just a few minutes time.
Q: How do I get good WVO?
A: Start by looking at the grease behind the
restaurants in your area. Restaurants that deep
fry food are likely to have the best stuff.
Sushi, Chinese, Fish and chips, Donut houses,
Mexican (they usually deep fry the chips) are
all good places to look. Burger houses may have
good fry grease but they usually dump in the
stuff from the grill with it. You will quickly
notice that all grease is not the same. Some
grease will look like piles of lard and smell
really bad. Just move on, this grease is not for
you. Some other grease will be liquid but will
have stuff floating on the top that looks like
little foam islands on the top, we call these
"Floaters". WVO with Floater can be OK as long
as the grease is good and liquid under the top
layer. Some WVO will be slightly brown color,
liquid and somewhat clear, with nothing on the
top (usually great grease) Take some samples,
put them in plastic water bottles so you can
look at them. Ask the cook what kind of grease
they are using, what they cook in it and how
often they change the oil. Frequent cooking oil
changes are preferred. Soy, peanut, cotton seed,
and rapeseed are the preferred oils. Avoid
linseed oil, it will not work. Most fry oil is a
blend of soy and peanut oil. If you can get a
few gallons, filter it, put it in your WVO tank
and go for a drive. Switch back and forth from
diesel to WVO. look for performance changes.
Good oil should give equal performance. Next
comes the PR part. Once you find some good oil
talk to the owner, ask if they are paying to
have the oil removed? If they are paying, offer
to take the oil for free. You may want to offer
to provide a drum for storage ( cost about
$25.00) . Usually the offer to take the grease
for free will tip the scales. If the owner still
doesn't want to give you the grease, just thank
the owner for his / her time leave your number
in case they change their mind, and move on.
Q: I have been running my 240d now for over 2000
miles with basically no problems. However it is
a little slow to start on mornings where the
temp dips into the high 50's even with the
injector heater on for 5 minutes before
A: Yes the initial start can take a little time on
cold mornings... If you regularly have temps in
the 50's-40's or lower consider a two tank
system or add Diesel or gasoline (not more than
5%) to the WVO Check your glow plugs for proper
operation. Glow plugs will only last about a year when running 100% WVO. Also you should have decent
compression... (300 PSI or more) Another thing that is critical to cold starting is properly adjusted valves. You should have the valves adjusted every other year.
If your car is 79 or older it usually has the
older style glow plugs... The newer glow plugs
are faster and work better.
It's possible to convert older engines to the
newer style glow plugs ... a new control box is
also needed... If you want to consider this option
the forum on Benzworld would be a good place to
Q: I am considering a two tank system for several
What if I get some bad or wet oil?
A: Water in the WVO is not really a heat issue...
water will settle to the bottom of the tank or
filter... each should be drained every so often
to remove any accumulated water.
Q:Should WVO always be used hot.
A: Yes and no.... It's OK to have cold WVO at start
up but not for prolonged periods of time... And
not while driving.
Q: What about biological growth?
A: Biocides like Biobor can
be added to prevent algae growth... also an
Algae X will prevent growth.
Q: I am a little worried about cold WVO being too
hard on my injector pump at temperatures in the
50's to 40's.
A: When the engine is cold start the engine and let
it idle for a couple of minutes then you should
be good to go. Warming the injector line before
starting really lowers the load on the injector
pump, by thinning the WVO at the injectors. Also
a little gasoline or Diesel will thin the WVO in colder conditions.
Q: If I put gas in the tank, does it need to be
A: No driving the car will mix the gas and WVO just
Q: Gas is lighter than WVO so it should float,
A: No it will stay mixed indefinitely, do a test
with a plastic water bottles and WVO and a
little gas. Mix some gas in one of the WVO
containers then put them both in the fridge.
After several hours remove them and compare the
Q: What is the
best pump for WVO?
A: We like the 12
volt 5 gallon per minute pump available from
First Northern Tool. Get the one without hoses
and install your own reinforced plastic clear
hoses. That way you can see the WVO being pumped
into your tank and make sure there is no water
or other debris. Lastly you should pale a screen
on the inlet to prevent chunks of food or other
foreign matter from getting in the tank. Here's
Q: Which engines
work best on WVO?
A: First you must
understand the basic operation of a 4 cycle
Diesel Engine. Here is a link to an animation
showing how the Diesel cycle engine works.
Diesel Engine Animation
Next you must
understand the difference between diesel engine
types. there are two basic 4 cycle types, IDI
and DI. IDI engines are Indirect injected and DI
are Direct injected. IDI engines work best for
WVO but DI can also work if you get good WVO and
don't do the switching until the engine is warm.
The main difference is that while less
efficient, IDI is more forgiving when the
injector tip becomes clogged. In a DI engine a
poor injector pattern can direct the fuel onto
the cylinder wall thus causing some serious
problems. This doesn't seem to be a
problem in an IDI engine since the injectors
spray into a small chamber and not directly into
the top of the piston. Another engine
consideration in the type of fuel pump. Bottom
line is inline Bosch type pumps work best.
Rotary pumps tend to fail more, even when using
petrol diesel. Lucas / CAV pumps should be
avoided for 100% WVO. You may get by on a 20 -
50% diesel WVO mix and a rotary pump. But keep
in mind none of this is guaranteed.
Q: Hi, My name is
Bill F. I have a WVO converted Mercedes 300D I use it to commute
220 miles a day to work , I was using a heated
PH8A filter for the primary WVO filter . This did not work well. It just
wasn't getting the WVO hot enough to flow
through the fiter. Also the PH8A filters I was
using have a
check valve in them which further increased the
vacuum required to pull the WVO through the
filter. I replaced the PH8A with the Fattywagons
A-1 heated filters and the WVO
system now works perfectly. The Fattywagons filter heats up fast in about 5
minutes, has a large capacity, and takes much
less vacuum to pull WVO through it. I
don't prefilter my WVO I just
pull up to the WVO tank and fill up. I drive
about 1,100 miles each week on WVO. This saves
me over $200.00 each day, or $100.00 each week.
I love using WVO as fuel since it saves me money
and is better for the environment than burning
Dino diesel. I can be contacted @
email@example.com if you have any
questions. Go Veggie!
A: Hi Bill, Thanks for the good press... As bill
said most of the PH8A spin on filters now have a
built in check valve.. this is the same filter
that fits the systems most WVO conversion
companies are selling. this creates a
restriction that causes added problems for the
fuel system. A PH8A also has several times less
filtering area than our big filter. With our
filter you'll be driving more miles before a
filter change is necessary. When you do change
it, ours is a canister filter that loads from
the top.. so the mess is less and purging is
much less work.
Q: I just got
the filters (all 3) , everything seems
to be in great shape. They are great! I
can see they are going to work really
well. I like the way you designed them
to heat the oil as they filter, can't
wait to try one out. This has to be the
best system out there. I also had an
idea for you based on what I've seen and
read on the net. What do you think about
running oil through a house water filter
(under $25 at Wal-Mart, $2 for 20 micron
poly filters) as you pull it from the
storage tank? Anyway, thanks for the
great filters and I will be contacting
you in the future for some of your other
really like the dash setup for the gauges too.
I'm glad you
received everything in good order and thanks
so much for the positive response. We tried
using water filters with cold WVO and I found that it really
slows the pumping / filling process. If you
have lots of time I guess it's OK but we
prefer to filter as we drive.
have now driven 130 miles on WVO. I still have
some air and bubbles in that small clear filter
at the injector pump and my vacuum gage reads
about -9 at 70 mph. Are the bubbles a problem?
My engine runs quieter and cooler than on
diesel. This morning I commuted to Nashville
from Manchester going 75mph for over an hour. I
CAN NOW HEAR MY RADIO!
Your comrad in grease,
to hear that you got everything
working... It's always fun to
hear peoples reaction when they
drive on WVO for the first time.
I think the quieter / smother
running engine is one of the
main comments, others are
reduction of black smoke, cooler
temps, and sometimes increase
power. All in all driving on
environmentally friendly free
fuel is a liberating experience.
for your questions... The vacuum
gauge reads in inches of mercury
0 -30. On a warmed up Benz with
a new filter the reading should
be 3-5 inches. When the vacuum
gauge gets up to 15-20 inches
while driving you should think
about replacing the WVO filter.
There will always be some air
pockets in the lines, this is
normal and does not cause any
problems. Air pockets should not
be confused with bubbles.
Bubbles move through the lines
and indicate an air leak which
needs to be corrected. You may
want to replace the heater
hose that you used for the fuel
line with a clear braided PVC
hose, the rubber heater hose
will likely degrade over time.
Q: I've noticed
that you have your filter mounted in the trunk.
Doesn't the veggie oil get cold by the time it
gets up to the engine compartment? How do you
make sure that your oil is as close to 180
degrees as possible? I've read that cold oil can
clog your injectors, and cause possible scoring
to your cylinder walls.
A: Hi Rich, and thanks for your concerns. You are
right, cold oil can cause injector problems and
possible spray onto the cylinder walls, but
mainly in DI engines. Our experience is that the WVO
looses little heat as it travels through the
Nylon hose to the engine. We do offer a hose in
hose set up and injector line heaters for the
WVO. This assures that the WVO is hot
where it counts, as it enters the injectors.
Q: Hello there
from Detroit I drive a 1982 6.2l diesel Chevy
Silverado (like the suburban, but with tailgate
instead of barn doors). It has an aftermarket
turbo. I am wondering if you have any experience
or advice on running this on WVO... I like your
prices more than Greasels. I would probably be
interested in the whole kit and am wondering how
user-friendly the plans are that you sell? Also,
owner of a 1984 240 inline 6 Volvo wagon that I
would like to run on SVO...any insight you could
offer would be great! One last thing, we are
moving to northern, Michigan--traverse city
region and it will be cold. Do you have any tips
for colder climates (besides going south for the
winter, ha!) Thank you for your time and looking
forward to your response.
A: Hi Dertroit, The GM will do fine on WVO as long as you
use good liquid WVO make sure things are hot
before you switch and if it's cold mix in about
5% gasoline or 10% - 20% or more Diesel. The rotary pumps
used in some GM, Ford and earlier
Dodge are a little weak so it's a good idea to
mix in a little petrol diesel to keep the
viscosity down. For a cold climate you will want a tank heater,
hose in hose supply line and injector line
heaters and some insulation around the filter,
tank and hoses. Turbo engines work well
on WVO. I have never converted a Volvo Diesel to
WVO... But I'm sure it will work just fine. John
Q: What's best IDI or DI engines, and what is
Most automotive diesels prior to the early 90's
are IDI. The difference between IDI and DI is
that IDI engines spray fuel into a small
pre-combustion chamber not directly into the
cylinder. DI engines spray fuel directly on the
top of the piston, on the top of the piston is a
small combustion area. While slightly less
efficient, there are some advantages to IDI
Diesels for operation on WVO. Most notably the
that the injector spray pattern is not nearly as
critical. This is why it's important to
make sure the WVO is warm prior to switching,
especially in a DI engine.
Q: Why do you
recommend the Mercedes Benz diesels?
A: For WVO the 77-85 Benz is a nearly
perfect car. It has an IDI engine and a
very durable in Bosch style injection pump. In
addition the cars drive well and are
very safe. Properly maintained these cars can
last a lifetime. WVO kits work on all diesels
but there have been more WVO miles logged on the
older Benz's Diesels than any other car.
Q: Hi, I'm
interested in your complete kit. I'm converting
a Ford E350 with 7.3 IDI engine (non turbo).
Does your system utilize the original lift pump?
Seems like it would be better to use a separate
lift pump. Any recommendations on this?
A: Hi Rick, We prefer to use the stock primary
fuel pump when we can. However some systems will work
better with a second circulation pump.
Q; Are there any
other companies that sell conversion kits?
A: Yes, there are
In Fact, if you go to our links page we list all
the conversion companies that we are aware of.
I'm pretty sure we
are the only conversion company that provides
links to our
competition, but we do this because we believe
that you should have access to all the information
before you make a purchase.
Q: I talked to you yesterday about running WVO
vs biodiesel and then went to a local shop that
I do some business with to talk to them about
making some changes on my pickup. They told that
in their experience running WVO is real hard on
fuel pumps and injectors due to poor lubricity,
in their opinion. What has your experience been?
Could this be due to poor filtration? They said
that they hadn't looked into the filters on the
vehicles they had worked on. Carl
WVO actually has more lubricity than petrol
diesel and Biodiesel... With WVO lubricity is
almost never the problem... what is hard on the
fuel pump is running cold or dirty fuel. Cold
fuel is hard to push through the injectors,
cold fuel stresses the injection pump
pistons, cold fuel also can cause deposits on
the spray nozzle, which can alter the spray
pattern and spray fuel onto the cylinder walls.
This is especially a problem for DI engines. IDI's are less likely to have this problem since
the fuel is sprayed into a pre-chamber. The
bottom line is clean
hot WVO will almost never cause a problem.
Thanks for your website! It is quite
I have a few questions I hoped you might be able
1)How long can I keep WVO in a warm climate?
Will it go rancid or something? Does it have a
"shelf life" ?
2) I hope to be able to convert a small P/U to
diesel and WVO ( ideally a Toyota 4wd ). My wife
is from Japan. I have thought of buying a diesel
engine from a wreck over there and shipping it
here and putting it in a similar truck with a
bad engine. Do you know if a Japanese motor
would fit in an American truck without
modifications? Any other suggestions?
3) Any suggestions of where to find an
inexpensive diesel station wagon?
4) How much do the replacement filters for you
heated filter unit cost? Are they available at
auto parts stores or only from you?
Thanks so much!
A: Hi Levie,
Here are some answers...
For the shelf life of WVO... clean filtered WVO
can last at least a year or more in containers
but you must keep it out of direct sun light.
Also there are additives like Biobor to prevent
algae growth. A WVO forum is a good place to ask
this question since we don't store our WVO for more
than a few weeks. I know you can buy diesel
engines for Toyota PU's and Landcruisers. Spectre Off
Road sells running take out diesel engines for
the Landcruisers. 4X4 tech has Benz conversion
kits. The only diesel wagon I'd
recommend is a 77-85 Benz. Replacement cartriges
for our filters
are $15.00 + shipping from us in orders of 10 or
more. The number is 3212 (2 micron) or 3210 (for
10 micron) If you don't want to buy from
us just call your
local Napa and get the price for your area.
Q: do you know of anyone that has tried running
a semi on wvo? I have a 470 Detroit that gets
around 6 mpg. Would your kit be big enough to
A: Yes there are folks using WVO on big rigs...
We make 2 and4 cartridge heated filters for big
truck and Boat applications. The cost is
$600.00 and $800.00 A fuel tank switching valve
is an additional $400.00. Other companies have
used just one filter on big trucks but our
feeling is for WVO you need to have more filter
area than a single filter can provide. Thanks,
Q: O.K., I've researched the WVO market, and I'm
bought. I've seen the cost of the "Greasels"
conversion kit for trucks. How much is your
conversion kit for an Ford F350 7.3 liter
powerstroke? Please write back.
A: Our cost for a basic kit is $450.00.. The
price doesn't include a tank, a tank heater,
circulation pump or under the hood heater. A
tank heater is only required if you live in an
area that normally drops into the mid 30's ..
for the tank you have a couple of options.. #1
get a small 5 or 10 gal tank for your petrol
diesel and use stock tanks for the WVO #2. If
you have 2 tanks use 1 for Diesel and 1 for WVO
or get a large 30-50- gal tank for the WVO and
keep your stock tanks for Diesel.
Q: As the only
heat source in a conversion, what would be the
minimum weather temperature you could operate in
before needing to add heated lines, heat
exchanger, heated tank, etc? For Mercedes that
temp would be lower, what would it be for a
vehicle with direct injection?
A: Hi Windrift, Your question is a little
confusing... but I'll give it a try...All WVO
system need to heat the fuel.. the question is
do you need a tank heater or under hood heater?
Most Benz's don't heed an under hood heater with
our system. Below about mid 30 you defiantly
need a tank heater... You will also need to make
sure the oil you are getting is liquid at temps
in the mid 30's My feeling is that good oil will
always be liquid in the 30's another possibility
is to blend in some Petrol diesel or gas with
the WVO Now for the DI vs IDI ... Yes IDI
engines can tolerate WVO operation at lower
temps but only because the injector spray
pattern is not as critical on IDI... so there is
no direct answer.. but the safe thing to do is
start on petrol diesel and then switch one the
engine is warm... usually about 2-4 miles...
Q: I'm interested
in changing out my pickup (dually) to grease do
you have any plans. all the sites say the same
and I want something that will last and your
aluminum kit sounds perfect. I thought you had
to heat the oil first in the tank, somewhere I
read you also had to refine the oil you get
(sounds to messy and timely) any info would be
appreciated. Looking to change out my 70
Mercedes 220d also paying $3.27 a gallon for
diesel now sucks. Fabrication in either steel or
aluminum is no problem also. thanks
A: With our filter you can usually just put the
WVO in you tank and drive, as long as you use
good collection techniques prefiltering is not
necessary. Tank heaters are only necessary in
cold climates. About 35 or below but this
depends on your WVO too.. If you need a tank
heater we sell them for $100.00. If you buy a
kit you will also get plans and support.
For now I would suggest you visit one of the
many WVO forums available. Just go to our links
you'll have all the infor you can handle.
Q: Hello, I am
really impressed with your system. Is there an
electric heater that could be added to the
system? I just wanted to know if there is a way
of using strictly biodiesel? The heated filter
is the key to delivering preheated oil to the
injector. Is there a way to use the existing
block warmer to heat the biodiesel in the tank
for initial start up? Once it's hot the normal
coolant heating should maintain the temperature.
Best Regards, Dom
A: Hi Dom, It's best to use a two tank system..
or add something to your WVO to thin it....Some
folks have biodiesel and WVO confused...
Biodiesel is made or should I say can be made..
from WVO. But emissions are less on WVO also it
is usually free... biodiesel costs is usually a
bit more than pertoldiesel...If you want to use
Biodiesel just put it in your tank... If you
like WVO you need to heat the fuel..
Q: Can you use
this system on a boat with two 350hp cats?
Thanks Answered on Apr-08-05
A: Yes Linda, we recently converted a Tug boat
with 3 engines run on WVO... We used one of our
4 cartridge heated filters for each engine. We
make 2 and 4 cartridge filters which can be used
for boats, large trucks or any big Diesel
engine. The price is $600.00 for the 2 cartridge
and $800.00 for the 4 cartridge...
Q: If I had all
of the questions, I'd ask them all at once, so
sorry I keep finding questions to answer. I have
a 79 Mercedes 300D that I'd like to put your kit
in, but am wondering where to get a tank? Or can
I just strap a boat fuel tank in the trunk and
go? I am off the deep end here so please pull me
back to firm ground. Thanks, Dan Merritt
A: Hi Dan, No problem with the questions... your
300D is the perfect car for WVO... You can use a
plastic tank or aluminum available from
Westmarine... they have about 15 different sizes
and shapes available here's a link to the tanks
Q: I live in Camp
Verde, AZ, and am thinking of a job in
Flagstaff. Even here it is often 17 degrees in
the winter here, and Flagstaff is even colder.
A: Hi Dan, In cold climates (anything where the
temps drop into the low 30's) a tank heater is a
must.. Warm up times will also be longer since
the fuel needs to be heated up a little to
flow.. We make aluminum tank heaters on a custom
basis we just need to know how long to make it
(cost $75.00) ...I would also recommend placing
the big filter as close as possible to the WVO
tank so the WVO doesn't get cold moving from the
tank to the filter. I hope this information
helps. There are also several good discussion
forums related to operation on WVO. Just do a
Google search ( WVO forums) and you'll find
Q: is this a
filter for biodiesel or are you using straight
vegetable oil in the kit?
A: Hi JB, If you want to burn biodiesel all you
have to do is put it in your tank... nothing
special required... But if you want to use WVO
(which is usually free by the way) you will need
a heated filter and fuel system with a switch
(Like the one we are offering here) to start on
petrol diesel and when things get warmed up
switch to WVO.
Q: Please tell me
about the kit and why I don't have to heat,
filter and wash the waste vegetable oil. Thanks,
A: Hi Dan, The cleaner the oil the longer
the filter will last.. it's just a pain in the
butt that's all... So we built a filter that
allows you to just pump WVO directly into the
tank Just think of it as an on board filtering
system. I personally get about 2,000 miles on my
filters using somewhat clean WVO directly from
the tank without any pre-filtering. This equates
to about 200-300 gallons of WVO (your own
experience may vary) I do suggest you use some
care to get clean oil. With our system and a
couple of spare filters, and a 12 volt pump you
can do a road trip on WVO... When the gauge
tells you the filter is getting clogged just
pull over and change it out. (about 3-5 minutes)
Ours is a top load filter and since the oil
stays in the housing purging is usually not
necessary. Our filter will clean the WVO as you
drive down the road... This is really not
possible with a small filter since they clog
quickly... I hope this answers some of your
Q: Hello. I am
very interested in your filter. I have GreaseCar
kit and now want to convert my 6.5L Chevy Truck
without a kit. Will this filter work well for
this application? Why is the filter mounted next
to the tank in the picture? Space? How long does
it take to heat up? Why aluminum? I heard rumors
that Cu and WVO do not "mix" well over time. Is
this true? Can you send me a link to read up on
this? Thanks, Heapalina, Or SoyBoy on forums
A: Hi Heapalina, You can mount the filter
anywhere you like... as long as you have a large
re- enforced hose between the tank and filter,
so it doesn't collapse.. I like them in the
trunk since it's easy to service there.. heating
time varies depending on how long your engine
takes to warm up... but a good rule of thumb is
as soon as your heater blows some warm air
you're ready to switch to WVO... Why aluminum?
well aluminum works good with WVO and water and
it has good heat transfer properties and is much
more durable than plastic... Yes copper and WVO
contact is a bad idea we use copper fittings for
our hose in hose connection but the copper never
comes in contact with the WVO..for more info on
the subject just google copper and WVO and see
what you can find.
Sometimes we get
asked why we like the W123 Benz so much. The
fact is that many folks consider the
W123 Benz one of the best all around cars ever
made. We couldn't agree more. They are safe,
handle well and are comfortable. Many W123's have
logged over one million miles. But a Greek
taxi driver by the name of Gregorios Sachinidis
with his 240D holds the record at 2.8 million
miles. Talk about a tough car!
Here's what one 240D owner
had to say:
This car is a tank! You can't kill it even when
This car is absolutely remarkable, and
remarkably slow. It's 0-60 MPH time is over 19
seconds. So it's definitely not the modern AMG
hotrod Mercedes of today. It does however have a
great running gear and will run at 90+ MPH all
day long, even with it's 60 something
horsepower. The interior of this car is
luxurious and comfortable, trimmed in wood and
chrome. It has an old fashioned sense of luxury
and charm that can no longer be found in today's
These cars do something to your soul. They become
a member of your family. I sold my car at
275,000 miles and the last time I saw it (2
years later) it was running like new. This was
the best car I've ever owned. If you find one
with low mileage, jump at the opportunity to own
one of these machines.
Some folks like the
tractor like performance and durability of a 240
if performance is more your thing keep in mind
that a turbo 300 will perform more like a gas