Quote:
Originally Posted by CamaroSpike23
wait a sec... so you say that the higher octane rating, the worse fuel economy...
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Different motor, but that has been my experience with my Cobalt SS/SC. I actually get better mileage with regular, but admittedly it is not scientific since I don't drive exactly the same every time, but it runs very nicely on regular, but I don't spend a ton of time in the upper part of the tach when I drive back and forth to work......