Originally Posted by jawjaw

The G35 must love the highway. I get 16-17 city no matter how I drive. If I ever get some highway miles, even if it's just a little, I notice a huge difference at the pump.

Mapester - If you are getting 11-12mpg more than once, something must be wrong or you are getting funky gas. At my worst of heavy throttle, late shifts, and short drives, I get 16mpg.