is 94 octane better for the car than 91?
#1
is 94 octane better for the car than 91?
I have been using Sunoco 94 octane in my '06 C4S figuring that it's better for the engine and for performance. Is it a waste of $$ and would 91 octane essentially make the same difference? I've heard varying opinions and am now totally confused!
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