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I wish i knew where the article is but it was in the Porsche owners mag that my dad gets it was a whole group of 911 owners in Texas or something that only ran 87 in their cars. They never had a problem. With out 11 to 1 compression i worry a little but honestly your not gonna hurt anything. You have a factory knock sensor and a pretty complex ecu its gonna pull timing when it senses knock thats what it is there for. I am not saying i am gonna go out and switch to 87. There is another school of thought that states 87 is less refined and has more "stuff" in it personally i think thats bs but what do i know.
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