Make Your Own Biodiesel Part 1

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There are at least 3 methods to run a diesel engine on biofuel using veggie oils, animal fats or both. All 3 are utilized with both fresh and used oils.


1. Use the oil simply as it is-- usually 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 two techniques sound most convenient, but, as so typically in life, it's not quite that easy.


1. Mixing it


Vegetable oil is far more viscous (thicker) than either petro-diesel or biodiesel. The purpose of mixing it or mixing it with other fuels is to reduce the viscosity to make it thinner so that it streams more easily through the fuel system into the combustion chamber.


If you're mixing veg-oil with petroleum diesel or kerosene (like # 1 diesel) you're still utilizing fossilfuel-- cleaner than the majority of, however still not clean enough, lots of would state. Still, for every gallon of


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


People use various blends, ranging from 10% vegetable oil and 90% petro-diesel to 90% grease and 10% petro-diesel. Some people simply use it that way, begin up and go, without pre-heating it (that makes veg-oil much thinner), or perhaps use 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 really difficult and tolerant motor-- it won't like it however you most likely will not eliminate it. Otherwise, it's not smart.


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


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


Higher viscosity is not the only issue with using grease as fuel. Veg-oil has different chemical residential or commercial properties and combustion characteristics from the petroleum for which diesel engines and their fuel systems are created.


Diesel motor are modern makers with very precise fuel requirements, particularly the more contemporary, cleaner-burning diesels (see The TDI-SVO debate).


They are difficult but they'll only take so much abuse. There's no assurance of it, but utilizing a mix of approximately 20% veg-oil of great quality is said to be safe enough for older diesels, especially in summer.


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


Just like biodiesel, some kerosene or winterised petro-diesel fuel blended with straight veggie oil lowers the temperature at which it begins to gel. (See Using biodiesel in winter season) More about fuel mixing and blends.

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