" From: KSiroonian@xxxxxxx " " Yes there are winter and summer blends of diesel. " [] " I think the winter blends have more of an anti gel addtive to prevent " freezing fuel due to the cold and moisture. the dealers also have an " additive they recomend be added in bitter cold weather to prevent " freezups. hmmm... i wonder if those additives would be as effective in pure biodiesel? " the medium duty Isuzu chev- " gmc cab over trucks mostly have the Isuzu direct injection diesel. Some " have a GM v-8 I think 2.....5 liter turbo diesel, 3.0 and 3.5 an up. fours or sixes? iirc they use pretty big fours, but i don't know details. i'd like to know transmissions too. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought