Having made 3 trips of 400 miles each these past 3 weekends, I've found that a best of 26 mpg is attainable only if I set the cruise at 76-78 and maintain it much as possible. This is with the a/c on, fairly flat terrain and tires at 34psi all around.
05 GT w/auto. and now 4700 miles. This weekend is the switch to Mobil 1.
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