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Originally Posted by matty-matt
top down, highway @ 70mph.ish 25mpg
top up, highway @ 70mph.ish 28mpg
around town and what not, 21mpg
2001 boxster s 6-speed
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Wow! 450 miles per tank on the highway!
I've never gotten much over 360-375 miles in a tank (23.5 mpg). I click the mileage reset after every fill up and generally put in 16 gallons every time. I've never, ever, reached 400 miles. I can't imagine averaging 450 miles.
I have noticed a big difference with the top off. Definitely lose a few miles per gallon.
I generally get 325 miles per tank (20.3 mpg) in mixed highway/city (top up/top down) driving.