Quote:
Originally Posted by lsturbointeg
i forgot but i remember my SA said it was fine to use 89 when i first bought the car but switched over to 93 after reading i shouldn't be using 89 but my mileage as i recall was around 320 but with the 93 i've noticed i get more mileage at 355
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Before Costco went Top Tier I would get about 50 miles less per tank vs. Shell/Chevron/76. Believe it or not, I also noticed a difference when The People's Republik went from 92 octane to 91.