Well I am driving my newly acquired 06 5mt G35 back and forth to work everyday and my communte is long, about 86 miles each way. I just have a drop-in K&N air filter and have 255-35-20's all around... nothing else and so far after filling up my tank I have driven 346 miles and still hve a couple of miles left in it. I drive about 75mph-80mph...I am thinking i can get close to 400 miles out of the tank...is that normal or above average? Do you guys think if I get a lighter flywheel, fr flowing cats and lighter wheels and tires i could stretch the life of each gas tank?

 

Buy a Prius, and drive your G when you don't want to worry about gas mileage.

 

Keep RPM's low, and I guess lighter/smaller wheels would help.. but yea G35 suck on gas mileage, you bought the wrong car (as did I)

 

I drive mine 95 miles each way to work. I average between 75-80 mph and get 25-27 mpg. My gas light comes on at around 420 miles.

I'm currently looking for a 2004 Honda Civic to use for work commuting as filling my tank ever 2.5 days is not wallet friendly.

 

A bunch of show-offs. Yea if you are worried about gas that much you got the wrong car. If you are getting 300 miles on a tank of gas be happy with that. I wish I was getting 300