We use number 2 heating oil at the mountain in all the diesel powered vehicles, groomers, auxilary engines for the lifts, snow making compressors, ect. The aux. units are mostly Cummins with a Detoit Diesel thrown in there and some wierd ass v-10 twin turbo oil cooled diesel thing that came out of an airplane I think. The fuel is actually pretty nice to handle because it doesn't smell quite as bad when you spill in on yourself, which is gonna happen when you have to lug the stuff up the mountain 10 gallons at a time on the back of a ski-doo sled.