A Yamaha dealer told me the same thing, not Pats. I brought in M1 0-30 full syn and the guy had a fit told me my sled would never start below 0. He got so pissed I walked out never went back. Long and short of it me and many buds all used M1 0-30 full syn worked great.Of course the Ski-Doo dealer is going to say that, would expect nothing less. OEM dealers want a monopoly of what you buy for your machines and they will say and do anything to advance that agenda. OEM branded oils are big business and many OEM's pressure their dealers into an oil program. Buy X amount of our oil, get a discount on you parts program. So dealers have to move the oils and convincing the customers that everything is no good is what many do.