im desputing with some that or car are capable of 31 MPG please help me out

 

When it was stock I was getting 29-30 on the highway with an M6. Now I get about 25.

 

bump bump

 

28+ with the T-tops out, still stock...

...but I'll say whatever you want, just change your avatar!

 

My car never got that good of milage, with a LID, LT headers, High flow cats and Cat back on a stock tune I did a best of 24 mpg with 4.10's and 95% freeway drive from CT to VT

BUT I wager if I had the car leaned out from idle to 2.5k as long as I am not commanding WOT It should get that awesome milage everyone talks about.

 

changed avatar

 

Our A4 car did a best of ~26mpg stock. Now my stock 6-speed Y-Body car gets ~31-33mpg depending on how I drive it, I can even drive it agressively once in a while and still get bottom 30's.

 

i'm at about 17-18mpg.... mixed city and highway driving.

 

I voted 12-20, but in actuality, I get 9-15.... lol

 

used to have a sturdy 28-30 back in the day....
10k in mods and I might push 23-24!

 

I only got about 20-22 stock. I don't know how people are saying they are getting 30+. Maybe if they are going 45 on the highway...

 

I now get 20-22 mpg with all my mods. So much damn traffic on I-10.

 

Stock I got 26 - 27 on the highway. Now I can watch the gage go down...

 

I have managed 30MPG all highway driving once. Other than that, I have done mixed driving, with mostly highway and gotten 24MPG.

 

224/228 .641/.646 110LSA cam, stage 2 CNC'd heads, Pacesetters, ORY, Hooker cat-back, ported TB, MTI lid/K&N, 30# injectors, underdrive pulley, Spec 3 clutch

32mpg with...stock 16x8 wheels, stock aluminum driveshaft, stock 10-bolt with 3.42s, SS hood, stock Z28 spoiler, stock LS1 brakes, LS6 intake

27-28mpg (including about 15min of 100-110mph) with...chrome AFS 17x9.5 ZR1's, 3" steel driveshaft, 9" with 3.89s, stock Z28 hood, SS spoiler, C5 brakes up front, FAST90 intake (not tuned for this either), lowered with Strano springs

So the 3.89s and all of the extra rotating weight hurt mileage a bit. I imagine lowering it probably helped slightly to keep the numbers up.

Car was tuned/dynoed with the first setup and made 420rwhp/400rwtq at Speed Inc. Trapped 118-119mph with both setups.

Around town was around 15-16 with both setups. I have no idea what the car got for gas mileage when it was stock.

Hoping for at least 25+ this year with a slightly smaller cam and D1SC @ 13-15psi...we'll see.

 

I voted 20-26, but I have gotten 30 hwy if I keep the speed down. More like 18 when I'm stuck behind someone doing 30 mph and braking for corners

 

When the car was stock it got 29-30 all highway driving @ 75 MPH ...now after all the mods it gets 26 highway @ 75 MPH .. with a 6 speed trans of course..

 

I got a best of 33mpg on a trip down to nc. I also got 32mpg going to pittsburg but the was the absolute best I've ever gotten in a mostly stock m6 with cat back and lid and ported tb. I also don't drive 70mph+ though either I make grandma look like speed racer sometimes.

 

I Avg About 28.4 On My Last Trip To Tenn

 

It's BS, that's how.