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Maybe do half tank premium and half 87 but it may not be worth the trouble. how about them octane boosters? anybody try them with a regular 87 tank of gas?

I saw a 2007 CX7 for sale pretty cheap but it had 71K miles on it. The guy said it was all highway miles and he has all the service receipts and that he used Full synthetic. how much more life you guys think this engine has? (boom08) Dave (doh)