Re: Fuel grade
I did an experiment during a trip from Arizona to Arkansas pulling a 5800# travel trailer, a 3400 mile round trip. The first half of the trip I only used 87 Octane (88 in New Mexico) and on the return trip I used 91 Octane. I didn't notice ANY difference in performance and at best I only gained about 1mpg with the 91 Octane. It's 87 for me........
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 '07 Tundra SR5, 2WD DC, 5.7L, Salsa Red Pearl with Running Boards, Delta Toolbox.
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