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Well, yup. Now I live in a perfect place for mpg....a small town outside of Phoenix and about 40ish miles to Surprise. State hwy and the cruise control set at 73 in normal mode. There are two spots where I have a safe 100+ mph goose it so I do drive it...otherwise my mileage would be better... ...just no stop/go...
On another site lots of owners responded and get much better than this it seems...I have a manual and the PDK has another longer legged cog so should bump it up a bit.
Nice.... all most all of my cruise control settings are over 70 in Az.... usually 73 with bursts to 100 + where I know I can...a few spots...probably why I get the crappy mileage
Our base 718 Boxster gets over 33 mpg cruising down the highway at 75 without any problem. The 718 Cayman GTS gets around 28 mpg at 75 on the highway. Our C7 Corvette gets 32 mpg at 75 just for comparison, Turbo 4 vs V8, with four cylinder deactivation.
Did 240 miles yesterday on 2 lane highway with much of it at 65 to 70 mph. Very few stops, though several slow downs for small towns.
I ended up with 29 mpg. LOWER than I Get on the Interstate at 80-85. Figure that!