Were these high volume gas stations or small mom and pop stores that may not move that much premium? Old fuel?
I don't know how the intakes are on the non M sleds but the M intakes leave much to be desired.
I have read of a few burn downs due to water ingestion from deep snow. A lot of gaps/big gaps in the intake tract that snow can be ingested. water pools right down in front of the throttle bodies. I put a pre filter from mountain fit hoods into the nose cone to "hopefully" remedy this.
The Ctec's are high strung 2 strokes with reduced oil consumption. Neither of those are a recipe for longevity.
I have read of adding a capfull of oil directly to the fuel when filling to attempt to bring ratio up in Ctecs. Imo, cant be any worse than break in mode.
The old Zuki motor would drink oil which may provided a very good buffer to bypass any of these issues. It used much more than the C-tec. That can't be denied.
I might start throwing a capfull or 2 stroke oil in with every fill up. I already did my best to head off water ingestion so we will see.
Also I fill up from high volume fuel source plus add Klotz octane boost just to help with any skittishness of the fuel quality.
Again, I wish you guys the best of luck and I hope your dealers treat you right.
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that's a legit failure. No oil = no bueno.