..I've had very good luck with WVO in my '84, and '82 300D's and the '83 300SD (same engine, of course). They've all run very well on WVO - no fuel related issues at all (assuming, of course, that you filter the WVO well before you put it in the tank!). The SD just left with a new owner - headed for Nebraska as I've gone to the dark side and bought a 2005 Passat TDI...feels like a golf cart after the SD!
fmb