Bought a '99 A4 Jetta w/ 250k miles a few weeks ago with Greasecar kit. Trying to do my homework on running WVO before I start putting together a system for processing the oil. I might have found a good fuel source; local pizzeria in town uses "Wesson Smart Choice - Cottonseed/Canola Oil Blend" (besides cottonseed and canola oil, ingredients include TBHQ and metyl silicone). I believe that Canola oil is pretty good for BD and WVO, what about cottonseed oil? I haven't read to much about that.