15 mph...............

 

my guess is you get off work and your in back to back traffic from the get go until you get home, right?

 

Still getting around 25 mpg, but I do about 50 miles of 70 mph highway driving and about 1 mile of city in my daily commute.

 

My G is strictly pleasure.. no work, winter driving, commuting with my G. I have a hooptie for that.

 

At 1.2k Miles I am averaging 16.8 mpg with AC and radio on all the time. Florida heat requires A/C. That is with 30% highway, 70% City. Went up from about 14 MPG when I first got the car.

 

Just turned over 2500 miles in my '09 G37xS. So far I'm averaging 22.5mpg and 40mph for daily driving. On a recent 500 mile trip I averaged 26.1mpg at 72.5mph with cruise locked at 75mph. This is on 91-93 octane. Overall, I'm impressed...

 

Since when does having the radio on make a difference in MPG? lol

 

Well the radio does draw current, so therefore that increases the load on the alternator and on the engine. Not much though.

 

Lol, I drive a lot faster with the music blasting, gotta keep those RPM's up.

 

Does the G37xS exist? How do you get the "S" package added?

 

its a gas guzzeler... 17 mpg

 

Yes, the G37xS exists -- at least in the sedan. I guess I should've specified in my OP

 

Unless you've got a serious sound system with a trunk full of speakers and amps, the radio isn't going to draw enough current to make the alternator put a load on the engine that you'd be able to notice. Come on....seriously? "I get .0001WHP with my radio off!!!!!" OMG!!!!!!! If it would even be that much......

 

Hey I put in my disclaimer when I said "not much though". lBut all of those small electrical loads do add up and do put a load on your car. But like you said it will be hardly noticeable.

 

I've averaged a consistent 20.5 mpg over 11,000+ miles with a mix of about 60/40 highway commute and city street driving..