Greetings . . .

What do you think would prevent him from running 9:1? Pump gas is anything you can buy at the filling station no? My wife's Volvo i5 in a V70R has 8.5:1 c/r plus 10 pounds of boost. Runs great on 91 better on 93.

It is interesting to that you say you had issues with 9:1 C/R back in the day. You talking high-test or economy grade?

regards,
stock49

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