87/89/93 wat octain gas to use for 97 bonneville
Hey, I own a 1997 pontiac bonnevielle se and i was just wondering wat kind of gas to use. In the manual it says to use the regular. But that is cheap and poor quality. I asked a mechanic and he said the higher the better, but i have also heard that the highest octane (super) or 93, would be too high. That the engine wont have enough power to compress the octain, and the deposit would be left in the cylinders or some place else. Can anyone explain how this works.
P.S.: its 3.8L series II with 205 hp and 240 torque, thanks.
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Yuri
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