I just bought a zforce 800 trail a week ago....it has the new engine but the dealer said nothing to me about it. Learned everything about it online. I called them, told them the situation, and asked for an updated owners manual as the manual i got is for the old engine. Well, mass confusion between the service dept and parts dept so they said they would get back to me. However, i can safely say the dipstick in the rear is engine oil. Its my understanding the transmissions use 75w90 gear oil and needs to be changed also. That dipstick is the one behind the passenger seat. I,m still scratchin my head tryin to figure out this machine so somebody please correct me if im wrong. thanks...