Originally Posted by DAC17
So, just for ha-ha's, I tried a tank of 93 octane in my SE 5-speed. I must admit there is a difference in the performance of the car, mostly in the ability to keep it in higher gears at lower speeds (which I assume is the knock sensor not triggering). I would surmise that this would result in slightly better gas mileage if driven accordingly. Having said that, probably not worth a $.30 or $.35 differential.
Noticed pretty much the same thing. Decided to try it after putting some really bad regular in my car (station usually carries good gas, but apparently not this time).
It's for sure not going to be worth the extra money for the better gas mileage (I have been harder on it than usual and it's gotten the same 30-31 mpg mixed) but I'll throw it in the tank every once in a while. Especially if I get anymore bad gas.