... When I first got my Z, I drove her to Houston and Back, all Interstate - I saw 27mpg on the Computer... Not Kidding. Ambient Temps was about 100°F, driving at 70mph on Cruise Control. She was bone stock back then and I was very easy on her because of the Break-in period...
Since then...a few mods...
I got used to the car, Love the K&N CAI+the Fast Intentions Deep Rich Exhaust sound which = Outstanding throttle response,
and Love the Eibach Sway Bars which = outstanding steering response...
Result... can't keep my foot off the throttle, can't get my mpg past 18 -20 at best...
Oh well, I certainly did not buy a Z to drive her like a Prius-of-S#!T...