The answer is yes: You can mix 87 and 91 octane gasoline without blowing your engine to hell. With that out of the way, let's discuss what mixing different octane fuels does to your engine in terms of ...
Q. I drive a ’99 Pontiac Grand Am. Since I bought it new, I have been using the highest octane gas. Now with the high gas prices, would I be doing damage to the car if I lowered the octane? R.M., ...
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