I recently added some mods (plenum, hf cat, y pipe, and headers) and it help my milleage quite a lot. From a 4 hr trip driving ~85mph (230 miles) I was getting 30 mpg and I had half a tank left.

 

Did you fill the tank up and actually calulate the mileage or just do an estimate based on the guage? If not you won't be accurate at all. That kind of number sound pretty high to me.

 

i avg 15-18mpg, never hit 20 mpg or past 280 miles on 15 gallon tank. Makes me wonder if theres something wrong when others avg in the low 20s. i have a messed intake setup, maybe thats why. I have no air duct behind the grill, just a jwt pop charger connected by an injen pipe thats meant to be the lower part of a cai, i think this may be hurting performance and mileage any ideas?

 

05 AT/19" forged wheels 17000 miles. I am all the time "accidentally" racing the engine, it really is hard to let off the gas once you get going. I average 15 to 18 in town. Does anyone know what tires are the best for the 19" setup? I just bought the car.

 

yo, i live in hawaii and I have a 05 6MT, I get about 300 miles per tank, but that number drops significantly if I do a lot of city driving. like disgustingly lower. I think somewhere around the mid 200's. its all the stop and go man. I run my a/c pretty much all the time so that should give you an idea.

 

all I know it's really bad, I am filling $40 bucks every 3 days..

 

i have a 05 auto.. fully loaded.. but the point is.. when i put full tank of gas i only get 290 miles. everyone seems to get like 350-400.. wats up with that.. but when i get gas at this one gas station in maryland i get 350. easily.. is philly gas ****? the airfilter is clean i got a K&N filter.. hmm can anyone help?

 

i have an '06 loaded also and i'm averaging 15-18mpg through my first 2k miles. i was hoping it would improve after getting through the breakin period and the first oil change, but it's still really bad! i'm only at 130 mi on this tank and the gauge has me at half full... argh

 

18.5 mpg for first 2k miles. Now I get like 19.5. Mixed city and highway.

 

I don't shift in the lower gears....It's just not as fun with the AT, manuamatic or not.......I usually coast up in auto till highway cruising speed, (anywhere from 40-50mph) then shift over to manumatic and up to 5th gear. I do this because I've noticed that while cruising in the 40-50mph zone, the AT keeps my gear in 4th....which I thought was the reason for my lower mileage.

I average just about 14-15 miles per gallon, which I'm beginning to see is not the worst case, but still concerns me.

about 4 miles of my commute is by highway, minor traffic in the afternoons.

 

I shift just before 2k, don't down shift till under 1400, skip shift if down hill or flat, drive like an old lady but smart and anticipate traffic leaving much room ahead to avoiding on-off gas situations. On the hwy cruise at 72 in a 65. don't drive many short trips (under 12 miles, this is a signifigant factor), use my 2005 Baja beater for those. check tires frequently,especially as temps change, use as many synthetics as possible

25-27 hwy
18-20 city

And other times I have too much fun and just won't check
03 coupe 6 speed

Mark

 

For those of you who can't even get 250mpg....

1) Make sure your tires are properly inflated

2) Stop driving like a mad man

3) The Neutral Gear is your friend

4) Use the brake pedal sparingly

6) Study the timing of traffic lights and use common sense. (don't accelerate into a redlight or traffic)

7) Only use premium gas.

 

My coupe has 4k miles. I tried to drive like a granny my last tank just to see how good of gas mileage I can get.

- I drive about 70% freeyway/30% local
- I always use traction onctrol as soon as I get on the freeway, and set it at 60mph
- I shift into neutral to let the car coast as far as possible whenever there's a long stretch of downhill on the freeway (about 1 mile at a time) during my daily commute. (not a smart thing to do btw, but I was just experimenting)
- I turn on A/C about 40% of the time

And I still get only about 22.2mpg. My Z4 easily gets 25~27mpg when I drive it semi-hard, and gets 37mpg with another passenger and a full trunk of luggage whenever I take a long trip from Seattle to Vancouver.

Well, it could've been worse. I could've been driving an RX8 and getting 13mpg.

 

my fuel average with my 6mt is 22mpg... thats me shifting at 3k rpm... and 91 octane... god i need to move to a state with higher octane gas... however i averaged 25mpg on my trip from LA to San Francisco... by the way these numbers are without air conditioning... its great weather for fuel efficiency right now because if it gets too hot... you can open your windows... if it gets to cold turn on the heat... god i love california... now to work on the octane issue

 

On the hwy i may get 20 mpg -22 city and hwy 50-50 i get about 17-18 mpg.There is no way people are getting 400 425 in this car.We only have 17 gallon tanks unless they have changed since 04.I have a 6mt changed oil ,clean filter.