Yea, I think it depends on the mods and how you drive. When I'm in the city I coast alot.. so maybe that helps. (push the clutch in and coast). I reset the ECU every season. Once when its cold in the winter, and once when its hot and humid in the summer. That might help too. I'll be going on vacation in 2 weeks.. so that will be the real test. Its 530 or so miles 1 way. I'll get a real good idea of what I get from non-stop highway driving. From what I have been getting its anywhere from 38 to 42 mpg. Depends on the humidity and how heavy I am on the gas. If I floor it everywhere in the city.. then it drops to like 23 to 24mpg.

 

My car is good on gas mileage but it always sucks to start it up. Seriously, it takes sooooo much gas to start up.

 

I live in the Chicago Burbs I get about 32mpg in mixed traffic and 38mpg on the highway

 

made it to 420 miles once with 3 people in the car. was in the middle of nowhere and pulled in finally to get gas. i think that was 13.2 gallons of gas to fill up at the station.

 

I'm usually always driving in city so i'm getting about a little over 300 miles doing that. My car always shifts around 3k or lower rpms.

 

k, I've been doing all city driving so far, and I'm about at a 3/4 (edit) tank, maybe a hair less. I've gone about 100-110 miles so far.. maybe 120. I'll take a pic tonight and post it showing my progress.
---Oh, and I've been medium on the gas.. a few highway ramps to get to work.

 

i menaged to do like 370 something.. and the light was far from coming on. i was coming back from FL back to IL and i didnt want to run out of gas so i stopped at a gas station.

 

For the last three months, I was getting 19-23 MPG, regardless of driving style, or environment. I had a short-ram intake, cheap canister muffler, Bosch Platinum II's, and used 89 octane fuel.

Just this last weekend, I started changing my car back to stock one item at a time, just to see what was killing my mileage. I started with the gas-no change. Took off the intake-no change, just quieter. Removed the plugs-BINGO, these things were killing my mileage!! The muffler is welded in, and since I had restored my mileage by removing the plugs, I just put the baffle back in and left it.

With the Bosch plugs, my car lost most of it's low-end, but was great up around 4000 RPM's. I now have the basic NGK's from Kragen, and get 29 MPG highway, 26+ in the city.

Car is a 2003 ES, automatic.

 

Long time ago my mechanic told me to never use Bosch plugs on a car unless it's WV, otherwise I will end up with a burnt piston.

 

Damn, I am lucky if i get 250 a tank...

 

220 - 240.

 

since no one runs the tank dry, people who post should have filled the tank, run their trip meter, and then say how much fuel it took to get the tank full again. full is when you squeeze on the gas pump and it stops right away. if it doesn't click right away, you've got some ways to go. if gas spills out, well, you put too much

topping off is bad, too. what happens is that your fuel vapor canister is actually gonna get fuel liquid into it wearing it out much faster than normal. your emission equipment *may* need to be replaced sooner. i just say may cuz it's not always the case but is what could happen by the engineers who built the system.

 

i've got an auto w/ K&N sri. i guess it's mostly highway driving with a little bit of city driving and i usually get about 320 to a full tank.

 

i drive a manual with cai, catback, and headers. would probably get around 300 to a tank, but i usually fill up at about 1/2 or 1/4 tank.

 

i drive all city...i get around 20 miles per gallon