[wonton1017]

I never realized how bad the gas mileage on my g35 was until I started driving other cars regularly. I was always worrying about gas every time I had to drive the g35... it was actually worse than my friend's e92 m3.

$30 on my g35 would get me about ~120km, a fill up would get me about ~350km if im lucky (fill up is around $90 now). 60% city, 40% highway. I drive without AC on 99% of the time.

This is with synthetic oil change every 3 months, went through at least 10 different intakes, plenum spacer, brand new spark plugs, brand new tires, recent alignment and everything you can think of.
Also upgraded to HFCs and exhaust to true dual exhaust, which are both supposed to help with MPG. Had every single the breather mod you can think of except headers.
Even tried a useless grounding kit that did nothing except make my engine bay look messy.
Before I sold the car, I did a $600 tune (never did a tune ever since I first bought the car stock). I was expecting my gas mileage to be improved after reading g35driver threads, but all i got was ~20km extra per full tank on average.
None of these mods helped, obviously I didn't do it for the gas mileage but I was always stuck at ~350km max per full tank no matter how old the oil and spark plugs are.

Had a 2011 g37xs sedan for a loaner for 2 weeks and $30 gets me 200+km easily.

Monthly, I was spending $350 (+/- $50) on gas for 1000km (+/- 100km).

On my new-to-me car w/ a BMW inline 6 twin turbo n54 engine, I'm spending less than $200 per month for 1000km. Getting 600km+ per fill up.