For WVO - Most important is you have to make sure it has no water in it. That would require the WVO sitting for weeks or months in the California hot sun (80-90 degrees temperature or higher). Or if you can't do that, then you'll need to make a heated barrel to force the oil to settle. The best way is to invest in a centrifuge. That will definitely take out all the impurities. But water is the most important killer to the engine.

After you get a clean wvo stock or just running virgin veg, you'll need to conscious about when you switch over from diesel to veg. Long trips are the best time to use veg because the oil gets heated up fully. If you are making short trips, say less than 15-20 mins, not worth it.


Coking in the combustion chamber is an issue with running vegetable oil. It's gonna happen, and if you do it long enough your engine will suffer from compression loss. I do suggest you consider adding a water injection system to clean out that coking. That would require injection of water every so often while running diesel. This should help in combating this compression loss with the use of veg.

At anycase, you should do research and get familiar with the cons of running vegetable oil and see if you want to risk it.

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- GreaseCar Veg System