There are at least 3 ways to run a diesel motor on biofuel utilizing veggie oils, animal fats or both. All three are used with both fresh and used oils.

1. Use the oil simply as it is-- normally called SVO fuel (straight veggie oil);

2. Mix it with kerosene (paraffin) or petroleum diesel fuel, or with biodiesel, or mix it with a solvent, or with gasoline;

3. Convert it to biodiesel.

The very first 2 approaches sound easiest, however, as so typically in life, it's not quite that easy.

1. Mixing it

Grease is a lot more thick (thicker) than either petro-diesel or biodiesel. The function of mixing it or mixing it with other fuels is to lower the viscosity to make it thinner so that it flows more freely through the fuel system into the combustion chamber.

If you're blending veg-oil with petroleum diesel or kerosene (like # 1 diesel) you're still using fossilfuel-- cleaner than many, but still unclean enough, lots of would say. Still, for every gallon of

veggie oil you utilize, that's one gallon of fossil-fuel conserved, and that much less climate-changing carbon in the environment.

People utilize different mixes, varying from 10% vegetable oil and 90% petro-diesel to 90% vegetable oil and 10% petro-diesel. Some individuals just utilize it that way, begin up and go, without pre-heating it (which makes veg-oil much thinner), or perhaps utilize pure vegetable oil without pre-heating it, which would make it much thinner.

You might get away with it with an older Mercedes 5-cylinder IDI diesel, which is a very tough and tolerant motor-- it won't like it however you probably will not eliminate it. Otherwise, it's not smart.

To do it appropriately you'll need what amounts to an SVO system with fuel pre-heating anyway, ideally using pure petro-diesel or biodiesel for starts and stops. (See next.) In which case there's no requirement for the mixes.

Blends with different solvents and/or with unleaded fuel are "speculative at best", little or absolutely nothing is understood about their impacts on the combustion qualities of the fuel or their long-lasting impacts on the engine.

Higher viscosity is not the only problem with utilizing grease as fuel. Veg-oil has various chemical homes and combustion characteristics from the petroleum diesel fuel for which diesel engines and their fuel systems are developed.

Diesel engines are high-tech devices with extremely accurate fuel requirements, specifically the more contemporary, cleaner-burning diesels (see The TDI-SVO controversy).

They are difficult but they'll just take so much abuse. There's no warranty of it, however utilizing a mix of approximately 20% veg-oil of excellent quality is said to be safe enough for older diesels, particularly in summer season.

Otherwise using veg-oil fuel requires either a professional SVO option or biodiesel. Mixes and blends are usually a poor compromise. But blends do have an advantage in cold weather.

Similar to biodiesel, some kerosene or winterised petro-diesel fuel combined with straight vegetable oil lowers the temperature level at which it begins to gel. (See Using biodiesel in winter season) More about and blends.