The numbers are just numbers, and reversible I hear. So 15K or 51K is just fine.
The oil they use is teflon or something like that. Synthetic oil, it lasts forever and never gets dirty.
Hey their transmission fluid is for life as well as the diff oil. Never have to change it, or top off. They use sealed units. That said, I change mine at 5K but that because I bought the car, and like the piece of mind on my tuned car.
