Wednesday, April 3, 2024

Can you run your diesel engine on straight vegetable oil???

 Running Your Car On Vegetable Oil?

I think diesel engines can run on vegetable oil, if it is done right. But that being said, I don't know enough about the technical aspects of that to determine what "done right" should be.

More filtration, different injectors, maybe a bigger badder pump. 

I have an idea that if it was easier to do this, our farmers might be growing and producing their own fuel. Which would be a good thing, in my opinion.


  1. I had a friend who ran an old Mercedes diesel car on used vegetable oil. It worked, but it was a PITA. The used oil had to be filtered again and again to be clean enough for the engine to run on. Then the oil had to be preheated before being pumped into the engine. In a SHTF situation this might be an option if you have electricity for the filtering system. I guess, if you used FRESH vegetable oil, all you'd need to do would be to preheat it.

    ...The diesel engine, as originally designed, ran on peanut oil...

    1. In an SHTF situation, this could come in pretty handy.

  2. Yes diesels were designed to run on vegetable oil. Main problem is cold weather makes vegetable oils too thick for the pump.

    I've driven behind our local restaurant truck burning used vegetable oil and it smells like French Fries.