My wife's G37 7AT will generally get around 23MPG with mostly city driving. She normally fills up around 14 gallons/before the 1/4 mark. She's typically around the 330-350 miles then.

I've only gotten one full tank in on the G35 6MT since I got it and I filled up 16 gallons with about 310 or so on the trip, which is a little over 20MPG. That was about 50/50 city/hwy and with me getting on it quite a bit as well as driving on tires that were inflated all kinds of crazy from the previous owner. Right side was at 26PSI (wouldn't have known until the light came on), L/R was at 33PSI, and L/F was at like 57PSI.

I should have known since I used to work in a Tire Center, but I was having too much fun driving another MT again. Hahaha.

 

03 6mt coupe, mods are longtube headers, no cats, K&N cold air intake, stainless Y pipe, and some kind of aftermarket exhaust. Lightweight flywheel and st3 clutch.113k miles. just did new plugs and o2 sensors I just bought the car this way.


So far, I drive ..ummm very spiritedly. Just filled up with 14.30 gal at 254 miles..the gauge was sitting just above E but no fuel light. Still learning this car so I was being cautious. So that is 17.79 mpg by my calculation. Hope it gets better, because my foot won't get any lighter..lol

 

SLICK gets 300 miles out of a full tank hwy and and a lot less around town. Sad part is premium fuel is $2.00 less in Texas than here in CA.! Ever wonder where all those $$ are going? The sure aren't going to take care of our highways!

 

Fueled up with our first tank from our own driving. I put down the hammer quite a few times and still managed nearly 21 miles/gallon. I'm pleasantly surprised as I was expecting 17/18.

The sedan will be due for a tune-up in 2k miles so mileage should get better then.

 

I average 20mpg city commuting, so that would put it to about 400miles/tank.

I've never actually put a full tank in it, usually only fill up 3/4 tank (maybe 15/16gal) and that gets me through more than a week of city driving.

One of these days I'm gonna fill it up all the way and figure the total mileage per tank.

 

Something is wrong with the car then. 15 miles/gallon on the highway?

In the 12 years I drove my 04 sedan, I averaged 21.2 overall. approximately 17mpg city.

 

I actually got 501 miles between fill ups once, and that wasn't even a full tank. 17 gallons. Filled up in Silverton Colorado, and it was all down hill from there

I probably could have made 580 that tank if I had wanted to drive it until the engine cut out.

 

New to me 2006 base sedan 5at 101k, been getting between 350 and 400 per fill. today I got 429 and put 18.9 gallons in. this is 60/40 city and hwy.

Due for new plugs, filters, and oil changes.

 

Just installed new rebuilt fuel injectors today and discovered the old injectors were dribbling badly. Hoping for a significant improvement.. stay tuned!

 

I average around 300 miles on about 13.5-14 gallons, 75% highway. I'm around 20mpg when I do a pretty even mix and can get up to 23 when I'm doing mostly highway. Back in college, I got about 14mpg because my campus was on a mountain and I did almost no highway.

 

About 240 a tank, oh wait that's on my GTO.

 

That's pretty bad...

I get 300ish on my truck (V8 F150 Supercrew), and it weighs more than your GTO. You must drive like a madman!

 

14 miles pg. Sucks but then again I drive like a maniac

 

My mpg gauge says about 410 when I fill up but made some changes to what stuff I use in it. I have a 2008 g35xs 101k miles on it. I use k100 mg gas treatment, AFE high flow air filters, and Starbrite synthetic engine coolant (dark blue bottles). Also run 91 octane non ethanol gas in it. I am not a fan of ethanol after doing some research. My g35 purrs like a kitten. I know this is an old thread but just thought I would share my setup.

 

Usually 250-280 in city with an 03 coupe. If I drive highway for the tank, which just did for 80% of the thank, I got 380 before needing to refuel.