While I'm waiting for a replacement water pump for my diesel daily driver (slow ground mail), and since I'm sitting on ready-to-use filtered WVO, I decided to try unheated WVO in my unconverted dual tank IDI...
Over 50% WVO with slightly less than 50% diesel works fine in warm weather... (I use my block heater to start it on that mix).
1994 7.3 IDI turbodiesel ext cab long box 2WD manual Ford F250HD XLT
1995 6.5 IDI turbodiesel ext cab short box 4x4 auto Chevy K1500 "Silverado" Z71
(and I like them both :P)