"I have a Velvet Drive 10-17-400 1:1 Ratio in a 1987 Ski Centurion. I have been receiving conflicting information on what type of fluid to use. I am told a Dexron II or III and I am also told straight 20w Oil. My manual isn't really clear on this subject. It mentions both of them in there, but doesn't really say which one to use. What should I use to be safe? I really don't want to end up replacing the thing because of this. Please Someone Help!?!?!?"