i've been running amsoil racing oil for last 3 years. 1500 miles on F7 just cleaned my exhaust valves for first time, it was almost a waste of time they were that clean. i'm on amsoils buyers program and its alot cheaper than A.C. oil!!
i was a dealer for amsoil for a while and the series 2000 does not burn hot enough in the exhaust system.................if you take your pipe and muffler out look down inside with a bore scope and look at the wet look . call amsoil and they will say the same thing...................race formula is for high heat, high reving engines.
I switched over to torco sso oil and I can see a difference in the exhaust pipe oil build up compared to arctic cat syn avp oil - there is none.
Burns clean, no smoke smells ok - if that makes a big difference to ya.
It is more $$$ than amsoil reg. oil and better.
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