Quote:
Originally Posted by Tcoat
They were concerned enough with the old ones to say NOT to use 87 so even if it "stays the same" they are not suddenly going to say it is OK.
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Yeah, of course they'll say not to use 87 and will specify 91 minimum. I'm just saying they likely haven't changed their requirements for how the engine deals with lower-octane fuel should it find it's way into the engine. I would guess that the new engine's susceptibility to damage or poor-running from lower-octane fuel is the same as the current lower-CR engine. I.e., nothing to worry about for most of us.