Most diesels will run on vegetable oil after some modification. The specialist company here in the UK is Veg Oil motoring.
But as Rooster says, you can't just pour it in and hope for the best.
Can I run my car on waste vegetable oil? I have a Mercedes cdi 200 diesel, year 2005, engine 2.2. Am I able to filter waste vegetable oil from a chippy so there are no bits in it, and then pour it in to the tank of my car to use for fuel?
No, it would just be an oil! It has to refined to use for fuel. I don't think it would even work as motor oil as it doesn't have the right viscosity. No, that's not going to work at all. What's going to make combustion for it to fire ? Has to be refined first.
I've tried it on a 1992 BMW 524 turbo diesel and it worked with a few modifications but I heard it's not good for the engine.