Rudi heres a place that tells you how plus has everything you would need to convert to vegetable oil. There are a couple of people in Ashville NC that said they have been doing this for almost 2 yrs now without any problem. I dont know for I have never tried, dont think I could being I'm fulltime Rv'er and Dont have the room to carry everything. thanks
Tom
http://www.journeytoforever.org/biodiesel_svo.html