Well after I drove about 60 miles, I filled up about 6 gallons. How can I possibly only get 10 mpg? Only mods are cold air and a dumped exhaust. I'm running on royal purple synthetic oil, and my tires are inflated correctly. I can't think of anything else. Should I replace my 02s? I once had a code for one, but it cleared itself...

 

so you went to a station filled your tank up then reset your trip odometer then drove 60 miles then to top off it took 6 gallons ..? correct?

 

wow. if thats true your getting Alittle better gas mileage then my impala

 

Yea, if you didn't do this, then it's totally user error

 

I started with a full tank and my trip set to 0. I drove 60 miles and then hit the same exact pump. I had about 60 miles on the trip at this point, and it took approximately 6 gallons to top back off.

 

And you let the pump stop the fill up each time, and didn't top it off manually? Because you can get 1/2 a gallon sometimes by topping it off yourself, and that would be 5mpg difference.

 

You an automatic? I'm used to MPG in the low teens in my stock 3.23 A4 car.My last tank netted me 11.4mpg,but that's with nearly 100% stop and go,low speed,short distance in-town driving with a heavy foot,though.I'm also pretty sure I'm on original spark plugs and O2's and that gas stations in my area have ethanol blends which can reduce MPG.

I wouldn't worry unless that last 10mpg you got was highway miles with a M6.

 

You should have your PCM scanned to see what your 02's are doing before replacing them.

 

In my A4 when I had 3.23s, my MPG was around 15 for town (not stop and go) and highway, on occasion it was 17, but I attribute my crappier mileage to my tune not being as good as it could be.

 

bolt-ons 3200 stall 373's 21 all highway. 18 mixed. here. i was getting 10mpg when my car was stock. but come to find out i had some fouled plugs, and bad wires. Good Luck.

 

It's an A4, I drive a mix of street and highway, and I let the pump stop on its own.

 

Damn I wish I got that good of gas mileage!

 

I get like 11-13 around town with a stalled a4. Expressway driving is around 17-20 with 3.23 gears, I am putting 3.73 gears in it so that should go down a little bit.

 

I get around 15-17 highway with TH350 and 3.42 rear..

 

im in the middle of a H/C gears, stall and a few other things build and im going to miss my 25+ MPH

 

i'm running stock 3.23 gears and when its mostly highway miles i avg. around 25mpg at 75 mph. in kansas wind. around town its avg. 16-19. but not for long...

 

10 mpg seems a little lower then normal.

I have most bolts ons and 4.10s and still get 24.99 highway and 16.88 semi-city (i say semi city because my commute at the time was 20hwy 4city)

But you can see what a difference four miles of city driving makes.

 

man, welcome to the world of the LT1. i get 8-10mpg. who cares. lol. i didnt buy this car for gas milage

 

when i first got my car all highway through an M6 got me 28 mpg when it was stock. now if its combined with bolt ons and no tune i see around 15-16. my O2's are alittle bad tho i think. i had just replaced them before i did my headers and didnt change them back to burn them in

 

Mix highway and city my LT1 would usually get 17, all city was about 12-14, all high way was maybe 21?