Re: V8 gas mileage

Posted by Owen_Dyneto On 2010/12/10 10:04:02

True that the super-premium gasolines are gone, much to the dismay of my 56 Caribbean. But I think the regular grades are of at least the same octane as the 50s and probably higher. But I believe it' the incorporation of ethanol that is primarily responsible for lesser mileage, I've seen the number of about a 7% penalty published several times. If you go back to the year before and first year of ethanol and then look at the EPA mileage ratings for cars with the same powerplant, I think that may confirm it.