Bluegrass Fuel Systems, LLC
Helping you turn used motor oil, transmission fluid, hydraulic fluid, gear oil, and vegetable oil into a clean fuel source that burns great in diesel engines and home heating furnaces!


Save 10-95% off your fuel costs by using motor oil, transmission fluid, gear oil, and hydraulic fluid!!!

All units come with a 30 day money back guarantee and a 6 month parts warranty!

We offer oil analysis and fuel testing to the public!


Bluegrass Fuel Systems
PO Box 802
Edmonton, KY 42129

Business Hours: 8-5, M-F CST



Welcome to Bluegrass Fuel Systems! We offer units that turn used petroleum based oils and clean vegetable oil into a fuel source that is compatible with diesel engines and home heating furnaces. We offer 3 unique systems that are easy to operate and service and are built right here in the USA.  Our goal is to help you make a clean biofuel product that runs well and saves you money!

 FREE GROUND SHIPPING in the contiguous US on all systems! 



The TF3000 works well on the road and is seen here filling a 1992 Dodge 250.  

Oil is everywhere, it just needs to be picked up, and you can save anywhere from 10-95% off of your fuel costs simply by using one of these systems to clean it. Yes, it does take work. This will not be as easy as going down to the gas station and pumping fuel in, but by using one of our systems and letting us show you the quick and least painful way to harvest your used oil, making your own fuel won't be a huge time-waster. For instance, we can pick up our oil, Friday's are generally oil pickup days, be back to the shop and process anywhere from 600-1000 gallons of fuel in less than 3 hours, and we can be doing other things while the fuel is processing because our systems do not require a babysitter. This quote by Thomas Edison says it best, “
Opportunity is missed by most people because it is dressed in overalls and looks like work”. We have over 60 years combined experience making biofuels out of used petroleum based oils. We build systems for both individuals and large bus/trucking outfits and foreign/local governments. We have a video below that shows the TF5000 unit in operation.

On the next few pages you will find four different systems, one of these will certainly fit your needs, from an individual who needs to fuel a single car to drive back and forth to work, to a large trucking company that needs to fuel multiple trucks everyday. We even have a setup for the DIYer. These units do not require any chemicals to be mixed with the oil, this process is much different than making biodiesel, and it makes a more stable final fuel product.

The backbone of these systems is the FP Filtration Media which is a special polymer that absorbs any type of acid, water, antifreeze, and paraffin. Please refer to "The FP Filtration Media" page here on our site to gain a better understanding about how and why this Media works.
The FP media is reinforced with a great filter setup that ensures the final fuel product is filtered down to 1 micron, and free of any harmful substances. Remember that diesel fuel from your local gas station is filtered to 20-30 microns at best!

Below are pictures of injectors and glow plugs that have been removed from our engines. They, to the extent that spark plugs do on a gas motor, give one a very good idea of what's going on inside the cylinders. Under each picture you'll find vehicle year, model, mileage overall, total mileage on used oil, percentage of used oil, and miles on plug or injector shown. None of the vehicles listed have had rebuilds or any other major repairs at all. 

We will also mention that we do not recommend, nor do the vehicle manufacturers, leaving glow plugs and injectors in as long as we have. They are "wear" items and should be treated as such, with proper maintenance. We treat our vehicles as test subjects. Manufacturers suggest that nozzles need to be replaced in Volkswagen and Mercedes every 90,000 miles, passenger truck injectors should be changed between 160,000 and 200,000 miles. Glow plugs, for reliability purposes, should be replaced once a year. 

Also a HIGH mileage comparison between running used oil and straight diesel is played out in pictures below using injectors from two 24V Dodge Turbo diesels!

1985 Mercedes 300td
Overall Mileage: ??? Odo. stopped roughly 15 years ago on 380,792 miles
Mileage on used oil: 97% of the miles have been on 70% used oil
These nozzles have well over 300,000 miles on them, 1st set of nozzles installed around 320k.
Can't say enough great things about these cars, if you're looking for a diesel car these WILL not be beat!

1985 Ford 350
Overall(OA) Mileage: 351,923
 Mileage on used oil: Close to 330,000 on 70% used oil
Glow plugs shown have 52,166 miles, stock injectors still in truck!

1997 Volkswagen Passat TDI
OA Mileage: 203,041
Mileage on used oil: over 202,000, tank of dealer fuel run out then used oil pumped in. Been ticking away on 70% used oil since. Stock injectors. 
Great little cars for fuel economy, TDI is very strong and dependable. 

1996 Dodge 2500
OA mileage: 325,681
Miles on used oil: 254,553 at 70%
Injectors shown have 273,672 miles and were taken out because larger injectors were being installed for more HP. Notice lack of carbon buildup! 

*Injectors sent in by customer Jack B., these injectors are also used in our 24V high mileage comparison. Please see testimonial page for Jack's letter sent to us with these injectors.

2002 Dodge 3500
OA Mileage, as of 8/6/10: 286,451 
Mileage on used oil: 173,915 on 50-55%
These are the stock injectors

HIGH mileage comparison between running on about 50% used oil, and running on straight diesel fuel. Quite a few people call and ask about carbon buildup and other such questions having to do with how used oil burns. Most think that used oil burns nasty and leaves deposits everywhere.....not true if done properly through one of our systems and burning the correct mixture. In fact the opposite is true, used oil will burn cleaner. Pics say it all! We were sent 3 sets of stock injectors that have run straight diesel, we picked the cleanest set. They were the middle set, not the highest mileage and not the lowest. One of our requirments for this was that both trucks be within 1 year of each other, stock, both truck owners to be close to same age (56 and 51), and used for the same purposes. Both trucks are commercial RV pullers, and fairly close to the same mileage.

Side by Side:

Injector on left is out of a 2002 Dodge 3500 with 286,451 on the clock. 173,915 of which have been on 50% used oil.

Injector on right is out of a 2001 Dodge 3500 with 257,389 miles. All have been on straight diesel fuel.

All six injectors from 2001 Dodge 3500 running on diesel fuel for 257,389 miles.

All 6 injectors from 2002 Dodge 3500 running on 50% used oil for 173,915 of its 286,451 total miles.

2 of the worst from each set:

Top 2: used oil
 Bottom 2: straight diesel

This is a good comparison and we've seen the same results over the years. We have pulled many injectors, glow plugs, taken heads off, torn motors completely down on vehicles that have run both used oil blends and straight diesel fuel. Over and over again, this is what we see. The used oil blends are burning cleaner as long as the contaminates are removed properly and the oil is running at the proper mixture.
The entire process of converting used oil into fuel using one of our systems is very easy. You will make your fuel using a ratio of used oil and regular diesel fuel, we recommend starting at a 10/90 ratio (10% used oil and 90% diesel fuel) and working down in 10% increments. Diesel fuel is needed to thin the used oil, your goal is to find the perfect balance for your vehicle. When you are testing for the right mixture your first dead give away that you are approaching your threshold is a major increase in exhaust smoke. You will see videos here that give you a good idea about what smoke you should and should not see. You really shouldn't notice any real smoke increase at all if you are at the right mixture, just a light puff at startup and maybe a very slight haze at idle. Again, we recommend starting with 10% used oil and working your way down in 10% increments. An increase in exhaust smoke is not something we want to see, it means you are sending unburned fuel straight out the tailpipe; this is bad for the environment and bad for your wallet.

See a perfect example of what your vehicle should look like running on used oil by viewing our video:


How To Order A System:

We accept credit cards, checks, money orders, and wire transfers.
-Contact us directly at 502-682-6785 to make a payment with a credit card or for info on a wire transfer.
-Click the BUY IT NOW button below the price of the unit you are interested in purchasing.
-Contact one of our dealers.
-Send check or money order to:

Bluegrass Fuel Systems
PO Box 802
Edmonton, KY 42129
*please contact us before sending a check or money order so that we can get your shipping information.

Check out what you can do with the TF5000 Filter/Pump package, a 35 gallon tank and a hitch carrier! Visit the TF5000 F/P page for more details. 

Stopped at a station in middle TN to fuel up the truck, look what we found! Sitting on the porch of a small storage shed behind the gas station we noticed 10 Gallons of used peanut oil that was going to be thrown away. We went in, asked, and the nice owners gave it to us! It always pays to look around.

The break-down:  We pumped 35 Gallons of fuel in the truck, which put it right at the "full" level on the gauge. Total cost for our diesel fuel was $20, which works out to 7.17 Gallons. We used 17.83 gallons of used petro based oil and the "free" 10 gallons of peanut oil for a total per gallon cost of $.57. If we would have filled up with straight diesel fuel the cost would have been $97.65, based on the pump cost of $2.79/gal. Spending $20 is certainly better than spending $97.65. Saved $77.65 on this fill-up!



How do we pick up our oil?

The quickest and easiest way to pick up used oil is by using a water trash pump, yes a water trash pump. We have 3 pumps, 2 have B+S gas engines and PACER brand pumps, 1 is a 3.5 horse and the other is a 5 horse, the third is a small 1" water pump and it has a Honda motor. They are cheap, reliable, and have their own power supply so you don't have to "hunt" for an outlet or carry a generator along. Simply pull the cord and turn the throttle up, but make sure you have the hose ends secure! The small 1" pump will push 24-30 GPM's and the larger pumps will push 100-150 GPM's. Again make sure those hose ends are SECURE! Imagine what can happen if a hose slips out pumping 150 gallons per minute, BIG MESS. Expect to pay $150-$250 for the small 1" pumps and $200-$350 for the larger pumps. They are absolutely worth it. For pickup tanks we use bulk transfer tanks, they are cheap and hold up very well, and the 6" opening and 2" ball valve make them perfect for picking up used oils. Expect to pay $50-$150 for a bulk tank, depending on the size. The one shown below holds 250 gallons and we use the small trailer to pick up oil at a nearby shop where our big trailer just cannot fit. Below are pics of our small pickup system.

Tank ratchet strapped on and pump bolted to floor. Hoses reduced down to fit small 2" openings.

PACER brand pump.

Little B+S gas motor

6" opening on top

Quick and Easy Oil Pickup!!!

What happens when you drop to a lower mixture than what your vehicle can run?

The main issue is smoke; flash point is high and fuel is not burning properly in the cylinders. If you continue to add more used oil, flash point will rise. More smoke will be noticed and eventually you will have hard start issues. Diesel fuel has a flash point around 120 degrees and 10/30 engine oil is around 310 degrees. Your goal is to keep that flash point as low as possible.

How can I clear the smoke up or keep from going too low in the first place?


Again, the smoke is a flash point issue, your goal is to use the most oil while maintaining a fuel mixture that is close to regular diesel fuel in regards to both flashpoint and viscosity.  For instance, if you take 90 weight gear oil and fill your fuel tank completely full, your truck will probably smoke excessively and start hard, however, if you cut the heavy gear oil with 50% diesel fuel, it will be a much better fuel overall, smoke will be minimal, cold starts will be normal, and you can drive knowing that you have saved 50% on your fuel cost. The golden rule is, if you see excessive exhaust smoke add more diesel fuel, if you don’t see any exhaust smoke continue adding 10% used oil. It is that easy! To keep from going too low only rise or fall in 10% increments. Most of the smoke issues come from just dumping used oil in without thinning with diesel fuel. 10% increments; an example: you may get to 70% used oil and still no smoke, but if you drop another 10% you might see smoke, it is that close sometimes. It helps to drop in small amounts rather than just "fillin ‘er up" with used oil and worrying about the diesel fuel later.


What mixture of used oil to diesel fuel can I use?


We have a year cut-off concerning this question. The older diesel engines love used oil blended with their fuel, they run better, start better, less diesel rattle is heard because of the increased lubrication, and they can take much lower mixtures than the newer diesels. WHY? Because older diesels do not have an extensive network of computer controlled sensors and emissions junk.  2003 was a big year for emissions standards, and 2007 was a huge leap, in fact 2007 and newer passenger vehicles that are specifically designed to run ULSD (Ultra Low Sulfur Diesel fuel) cannot burn any type of biofuel, they must burn ULSD, and it is against the law to burn used oils in the 2007, 2008, 2009 passenger cars. Sorry, if you have one of these new year models we cannot help you. But if you have a 2006 or older passenger vehicle, or 2010 or older heavy equipment, this fuel can be used in your engine with great results.


-Passenger vehicle engines 2003-2006 can run from 10-50 percent used oil, the Cummins, Powerstroke, Duramax, VW and Mercedes diesels all run great on this biofuel.


-Passenger vehicle engines 2002 and older can run from 30-95 percent used oil. The older Cummins and Powerstrokes are great motors and run very well on any biofuel, the older 6.2 and 6.5 Chevy’s, the Ford IDI motors, good ‘ole 6.9 and 7.3 naturally aspirated, the Mercedes and VW diesels all run very well on the fuel made in our systems.


  (good time to note here that if you have a 1995 and newer Chevy 6.5 diesel contact us about running biofuels in this motor because of the optic sensor that plagues these engines, it is possible to run biofuels in the newer 6.5’s but some added precautions must be taken)


-Heavy equipment 2010 and older can run from 30-95% used oil. All types: road tractors, ag tractors, backhoes, stationary engines, etc. 

Good-all around mixtures for most newer diesel engines are 30/70 or 40/60 blends (30% used oil and 70% diesel or 40% used oil and 60% diesel).


Good-all around mixtures for older diesels and heavy equipment are 50/50 or 60/40 blends (50% used oil and 50% diesel or 60% used oil and 40% diesel). Although most older diesels can and will drop lower than this, but do not go lower than a 95/5 mixture.  

What type of oil can I use?


Any petroleum based oil is compatible with our systems, this includes:


-Motor oil

-Transmission Fluid

-Hydraulic Fluid

-Gear oils

-Transformer oil

-Crude oil
-Imaging oil
-Bunker oil

-Vegetable oil


Oils to stay away from include hydrogenated vegetable oils and fats, the veggie oil you pick up must be free-flowing and clean. Also it is advisable to steer clear of really heavy gear oil, 90 weight and under gear oil is fine, and stay away from bearing grease, etc. These just require too much diesel fuel to thin them down. If you are unsure about the thickness of the oil you have send us a sample to analyze and well give you the thumbs up or down.

Don't see a system here that is big enough for your needs?

Contact us directly, we are constantly driving across
North America and flying elsewhere, to design larger, custom units for clients. We do charge a consultation fee but the fee is refunded when you purchase the unit we have designed for you. Larger systems also included one-on-one training.

Bluegrass Fuel Systems
PO Box 802
Edmonton, KY 42129


Fuel Testing and Oil Analysis:

Oil Analysis: This lets us know if issues are developing and if a particular oil is running well in your engine, transmission, hydraulic system, air compressor, etc. An oil analysis will also let you know if oil change intervals can be extended and includes a TBN (total base number) test, which measures the amount of additive still active in your oil. We can also test for TAN (total acid number) if your sample is from a transmission or hydraulic system. Please call us for sampling info, 502-682-6785. 

Price: $55

Fuel Analysis: By sending in a sample, petro based oils only please, we can find out what contaminates are in your used oil source (water, antifreeze, wear metals, etc). We will also be able to tell you the viscosity and flash point of your sample. If you send in a larger sample (at least 1 gal.) we will perform a run test by burning it through one of our stationary engines to determine how well the sample burns, what blend we are able to run, and any smoke issues. Please call us for sampling info, 502-682-6785.

Standard fuel analysis: $55

Standard fuel analysis with ash%: $125

Other tests:

Grease test - $80
Specific gravity - $40
Viscosity index - $60
Solvent - $55

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