I also have a 2000 model with 2.7, but with a 5 speed Manual trans.
In 5th gear at 75mph, I am around 3000rpm. As far as I can tell, it is normal. I average 23 mpg mixed city/highway. I get about 400 miles or so on a full tank.
I also read that it is good to rev high in the Boxster. Babying it will kill it slowly.
I guess it also has to do with what speed it shifts gears.
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00 2.7 5SPD MT
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