I'm not sure what the real effect of a whole lot of un-burnt fuel would be?? Would it cause piston wash? Carbon build-up? Fouled plugs?? I really don't know!! :hmm: But I know that an engine designed (compression & timing) to run on 87 will not completely burn a higher octane fuel, esp. something as high as 104, so there will be un-burnt fuel. I'm just not sure in what "state" that fuel would be in? (again, would it still be semi-liquid, perhaps cause piston wash?? ... I dunno?!)
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