RE: Old new car question,please see what you think
My MX6 runs on 91. Gets better mpg then on 87 and it doesnt mess with the plugs. Dont know who said it but all cars would run better on 91 cuz it burns hotter or something to that note. Im not a gas expert by anymeans but I personally try to avoid ethanol blends being my car is older (kinda in line with what Sinister said).