Thread: Boxster Stamina
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Old 05-20-2014, 10:50 AM   #10
tonycarreon
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Join Date: May 2009
Location: Frederick, MD
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on my long highway drives i tend to average somewhere in the 24-25 mpg at 80-85 mph. i notice i get a little better when it's warm outside, a little worse when it's cold outside. i put the top up on the highway and usually keep the windows up as well. i think the best i ever got was 28mpg.
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