Something sounds fishy about this. Is Europe 95 octane the same as American 95 octane? Engines now are designed to run on 87 octane. Would there have to be changes to engines to support this? I agree with those that say get rid of the Ethanol. It’s bad for your engine.
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Easier to meet fuel economy standards if you raise the compression ratio. Going from 87 to 95 would allow a huge increase in compression (and way more horses too).