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Discussion Starter · #1 ·
Filled up in the mountains, drove to the coast, engine isn't its usual happy self. Some roughness, sputtering, etc.

Refilled with 87 ethanol free, problem solved.

You'd think with all of the onboard computing power that these engines could overcome a different local blend of summer gas!
 

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Winter gas has something like butane in it to help it ignite easier in cold weather, summer gas is w/o that but should not affect engine. Maybe was some contaminated gas.
 
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