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Wouldn't an engine that knocks be less powerful than an engine that runs smooth without any knocking?
We can't get 93 in most places in California. I've never seen it at any pumps in San Diego. I have to put 91 in, and i think my engine does knock a bit as a result.
Not sure about MN and other places, but in California, the highest octane gas I seem to be able to get is 91, not 93 like the Porsche recommends.
Anyone ever use any of those octane booster additives?
Larez2
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