stangslayer98

maybe someone is siphoning your gas? unless you keep it in a garage, sorry i think this way living in a big city does that

Gordon0652

iTrader: (4)

Do you have a tune?

Damn, i was hoping i was not going to have HWY MPG like that... oh well.

HotWhipT/A

iTrader: (31)

Do a tune up like everyone said. Change that fuel filter too.

My 500+ HP 402ci. gets 12.5 city. I've been on one trip about 100 miles and got 22 mpg hwy with my 6spd.

Nitroused383

iTrader: (10)

I would check for a hole in your fuel lines or gas tank. Also your o2 sensors are probably toast, if your tune is running in closed loop I would check your o2's. They control your part throttle cruising air fuel ratio, they will have the biggest affect on your fuel mileage.

lemons12

iTrader: (71)

its totally worth it...

if you keep it at or under 60mph its not that bad... anything over that slaughters MPG with 410s in an a4..

at 60 im right at 2200rpms, which isnt bad... at 70 im at like 2600-2700...

99bowtieZ

You could worry about it and do all of that... or you could just tell yourself your car really gets 100+mpg and you just have a hole in the tank...

lemons12

iTrader: (71)

ahhh, hell.. i stopped worrying about MPG a LOOOONG time ago.. gotta pay to play..

ItsNotStock

iTrader: (24)

I wouldnt worry too much about it. My stock engine got 12mpg in town, but on the highway I would get 28-32mpg. It's all in how you drive, step on it once and the mpg goes downhill quick.

99bowtieZ

Hell yea, I figured it out when I got the car and stock (the way I drive an m6) I was getting around 15. Since then I just try not to think about it... I'd hate to know what I'm getting now, so I don't bother calculating it.

lemons12

iTrader: (71)

hhahaa..

Sunset'01Z

iTrader: (10)

what buggs me the most about modding is the range you lose. money isnt that big of an issue for me, i dont like going 3 days in between fill ups lol

black_phoenix

iTrader: (27)

whew...... so i am not the only one who gets shitty gas mileage... Right now im at 170 miles and i gave 1/4 gas left... Mixed driving

But i do have full bolt ons and a heavy foot though...

Gordon0652

iTrader: (4)

Lemons12:
What program was used for your tune? EFIlive, HPtuners, etc...? Sorry for the .

nitr0racing21

iTrader: (5)

I get 130!! till I need to fill up! and thats filling 11 gallons


130/11

MeangreenHD

iTrader: (6)

I would get that knock sensor in there pronto. my lq4 in my truck **** the rear knock sensor and the mileage was bad, real bad.

i average 17 in town with my m6, no cats and long tubes and junk

ls1greg

iTrader: (2)

Damn, I thought I had it bad when I was only getting 22 mpg after my twin turbo install... and I wasn't always ***** footing it either.

Midnight02

iTrader: (8)

Something definitely isn't right here. I'm pretty well modded and still manage 10 - 11 in the city and can get 18+ on the highway with 3.90's in the rear.

lemons12

iTrader: (71)

i dont use hand held tuners, i take it to my tuner and he dynotunes it.. i dont know what he uses..... he just hooks his laptop up and goes to work.. i could find out for you if you want me to..

Gordon0652

iTrader: (4)

No thank you. But thanks!
EFIlive & HPtuners are not hand held. I am just tuning my MS4 cam on EFIlive and i am having a bitch of a time doing it.
To the OP, sorry .

lemons12

iTrader: (71)

theres no way i would try to tune it myself.. not with that size cam.. i know some people who have used hptuners with it... but dont know how their luck went...
if i were you as soon as you get the 300 bucks or whatever tuners charge in your are (a good one) get them to dynotune it.. i love my cam, because of my tuner..