Quote:
Originally Posted by cRiPpLe_rOoStEr
Unless the ethanol content of the gasoline is increased, I'd take bumping up the compression ratio with a grain of salt.
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All else equal, you might get half a percent fuel economy out of a thinner head gasket. Most OEM designs have some safety margin built in with regards to ignition timing, so a quarter or half point of compression isn't likely to cause ignition retard.