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Old 03-16-2007, 02:17 AM   #2
IHateHacks
20psi boost
 
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Join Date: May 2006
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This is an age old topic. I'm not going to get into it but to answer your question, no it will not hurt anything mixing 87 and 91. If you want to know I use 93 everytime I fill up, even when gas is above $3 a gallon.
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