It's an economy car, don't waste money on premium gas for it. 'Taint no sports car.

I actually tried 89 octane in my 2000 Accord on this tank to see what would happen instead of 87 octane. The engine doesn't have as much kick and the mpg is probably going to amount to 22 mpg instead of 25 mpg around town.

I guess the ECU can't adapt the timing, in this case.

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1985 CA 300D Turbo , 213K mi