Quote:
Originally Posted by MrPeabody
I found in my '05 the premium fuel increased gas mileage enough to cover the higher price. About 10%.
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I've been checking that out on our 2019 Acura RDX but nothing conclusive yet. Like the Vette, premium is "recommended" but only 87 octane is required. Since gas has been cheaper, I've been using premium. At first it seemed to help but my last highway trip my average dropped.
I don't get the vette ('07) out on the highway often and in town I don't think it makes much difference unless I drive more aggressively than normal.