89 and GT Performance
I've seen this discussed before but still curious: This weekend I drove to my folks a few hours away and decided to fill up with 89 (2003 GT) at Shell. What confused me was that I got excellent mileage and the performance seemed to be almost comprable to 93.
Am I nuts or is this possible? If it might be safe to run 89 (not cheapy gas stations either), I'd like to continue. The fuel door just says, "recommended" not "required".
Any ideas? Thanks very much !!
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