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Old 05-19-2008, 03:33 AM   #19
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Join Date: Feb 2008
Location: Florida
Posts: 29
For an 05 987: Pre 10% ethanol in all central florida fuel - 23 to 24 mpg mixed highway / city driving. 29.5 mpg on an Atlanta to Orlando trip, top up, 75 mph tp 80 mph.

Now with the 10% ethanol fuel - 20 to 21 mpg mixed highway / city driving. I have not done a road trip, but right after fill up, on a 10 mile highway stint at 75 mph the OBC noted 27 mpg.

It may be a coincidence, but I think the ethanol blend has robbed some fuel efficiency.
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