15 mpg or so. I wouldn't ever expect to get better milage unless you do a majority of highway driving.

 

last 10 gallons 55% highway 45% city i got 17.6 mpg.. not bad it is definitely better than 11 mpg that i was getting before all local. MY engine is broken in now YES!!

 

20mpg mixed city and highway. mostly city.

 

Sorry to dig up an old thread but my mpg has been dropping ever since I hit about 1700 miles on the car. Prior to 1700 miles I was getting about 15.5mpg, then on the tank after I got 14. Now my current tank(~2200) is looking like 11-12mpg. I haven't really changed my driving habits and I realize that with 100% city mpg isn't gonna be high but still.

 

i get like 15 mpg city/freeway combine i reach 300 miles and my car now have 6500...

 

how much is a Z tube and where does anyone reccommend getting one?

 

75 bucks on everythingG35.com

 

K, Thanks!! i'll be sure to check it out~!

 

i got 365 miles on my 06 and it has about 1k miles right now.........I accidently topped the gas off today and it spilled out, is that bad?

 

From what i remember when i was taking emissions/diagnostics was that in hot temps gas will expand and becomes really pressurized. Take for example when you fill up on a hot summer day and you are around less then a quarter tank. When you unscrew your gas cap it makes a hissing sound. That hissing sound is all the pressure build up thats being released. If you keep topping off you are liable to create a gas leak later down the road because of the built up pressure the tank undergoes. This is only if you keep doing it everytime you pump gas, but every oncein a while if you accidently top off it shouldn't create a problem. Those gas signs at the station obviously means something when they suggest you shouldn't top off.

 

Yes, gasoline is bad for your paint. If it happens, you've got to neutralize it ASAP with water which you can get from any gas station.. The best thing to do is to follow nikko's suggestion: don't top of your gas tank.

 

everyday I go to work it's about a 20mi commute i've been shifting at 2500rpms and i've gotten about 26 mpg on a full tank, not bad for a ton of red lights

 

17,545 on my 03 and it averages 22-23 combo city highway driving.

 

I notice the same thing. As soon as I start the car, it revs up to 2000-2400 rpms. I'm glad I'm not the only one. It idles around 800 rpm when warmed up, which seems a little high too. (I have an '05 6MT sedan)

 

I have been getting 18 ~ 19 MPG mostly local, 10min from home to train station, I thought it was cause by low oil level, but after reading this, I feel much better.