I'm not starting a what oil should I buy thread nor do I care about what gear oil from the dealer I should buy. But I am sick of 8-9 bucks for 900cc's of gear oil! No one around that I know of uses it (rotella),although I hear great thing's about it, that and ATF type-F but ATF has about an hour of use in it for motocross.Anyway who Uses it for MX and what 10w30 or 10w40 full synthetic or non.When are you change intervals? Thanks guys. edit:for a two stroke!