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Ed,
Your car would probably benefit more from racing fuel than mine due to the 7.2 DME and chip tuning on your car. These things should adapt quickly and make better use of the fuel. A turbo would benefit even more. My car... nada. 93 oct pump gas is the cats meow on my car.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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