Quote:
Originally posted by AaronM
I'd say to try a small amount of 87 first, there is, after all, some variation between engines, even when mass-produced and age increases those variations. My dad had an Explorer with the Ford 302 V8, specs called for 87, but it would ping when hauling/towing with anything other than 91+, so we just always ran 91 (no-one could find any issues with the engine, so we just chalked it up to production variances).
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We had a early model (92 or 93) Ford Explorer model V6 that would not run well on anything but premium. When I say not when I mean bad pinging, from the day it was purchased Not only did it need premium but it was a gas hog even for a V6. It only got 18mpg. Talk about horrible...