Quote:
Originally Posted by oldschooleco
I read somewhere that Mazdas have relatively "high" compression and that running 93 would have mpg benifits? any one have any backing to this?
|
Not likely; higher octane would have been specified by Mazda if necessary to prevent pinging. You might see a benefit to economy if premium fuel at the particular station does not contain ethanol (and regular does), because there's actually higher energy content in a gallon of non-ethanol gasoline.