Just finished putting a new track on my 07 Switchback, and now need to put oil in the chaincase. Looked in the factory service manual as well as the owners manual and they don't give a weight or service classification of the oil like you would typically see in say your car service guidelines. All they say is to use Polaris Synthetic Chaincase Lube. I have a bottle of Mobile 1 Synthetic gear lube in the garage that is 75W-90. Wanted to know if I could use this in lieu of the mystery Polaris Oil. Any thoughts?