torchredmadness

Just got back from filling the Vette up with gas. Did some calculations and my numbers are 15 mpg over ten tank fulls. The car is stock. Runs great. We're not speed demons. I read about people getting high 20's ,low 30's all the time in The Forum. My wife says they must be the ones who need the skip shift bypass!

mikes1hog

Did you use the car's mpg calculator or did you do it with a stubby pencil? What kind of gas are you using? Clogged injectors? Tire pressure? clean air cleaner? Lots of factors....

Vetteman Jack

What is your percentage of highway vs. city driving? Much stop and go traffic conditions? If all city driving, 15 mpg may not be too far off the mark.

baxsom

that sucks, my full size SUV gets better than that.

AU N EGL

if it makes you feel better I get 4 to 6 mpg, on the race track of course.

ALLEGRO

So let me get this straight. You get 150 miles out of a tank of fuel? I find that pretty difficult to believe if you in fact are not "having fun" each time you go out.

I just did a 20 mile funeral procession today in no higher gear than 3rd, and I got 18mpg during that stint.

Check your mileage again and be certain of your math. If you are getting 15mpg, and a lot of your driving is on the highway, then you are getting about 1/2 of what most get.

Fast20

I am getting 23.5 mpg average according to the cars mpg calculator and I DON'T baby it. Something is not right with yours.

jrose7004

Something isn't right somewhere in your calulations.

Silverbullet00

I still get 28 or better on the highway with a 228 230 58 581 113 LSA cam,,,you have some problems or you math is screwy

sonny557

Couple of weeks ago we took a trip to san Antonio, my average mpg was decent i think

20vette0107fatboy

I used to have a pic of it, But I have a 2001 coupe 6-speed...American racing long tube headers (catted),,breathless performance cold air intake,,Ported throttle body,,,corsa indys...Drove out to corvette carlisle two years ago,my average MPG was 21 going there.(249 miles)..Got the car tuned by East coast supercharger and on the way home, My average MPG was 29.6 crusing about 75 MPH......My 2004 has american racing LT headers and england green mayhem ll cam. My average is 26 MPG

04blackice

R u towing a boat??

Marine One

fishingdan

My last tank in the '03 was 29.4 according to the DIC and I usually get 30-31 or better on trips (MN6). I think your calculations are off.

C5Wolfe

My "99" with the 3.15 gear gets 30-31 mpg on the highway and around 24-25 combined so i think you've either got a very heavy foot or a real problem! I've hade 3 c-5s in a row and got excellent mpg with all three. And yes, they were all modded to some extent.

AmethystVette

I hope the one I'm picking up in a week is better than that on fuel.
I am hoping to get some relief from the 11mpg I get with my Escalade.

tiojames

Definitely something wrong somewhere. With all the mods, I get 18- 20 around town and 22-24 on the road at 80-85. Sounds like it could be a sensor problem.

torchredmadness

Ok. I hope you are all right. I will get some help with my math and check back in. The car is very well maintained by a well known mechanic. It runs like a champ. Stay tuned!

dgrant3830

Pull your codes. You might have something going on. Even my '99, freeway, 31mpg and its got 326K miles on it. In town, it runs about 23 or so.

jcsperson

I'm averaging 15-18 with a big stroker motor and a heavy foot. That's calculated the old-fashioned way, fill-up to fill-up.

DIC says 21-23 on the highway. I'm not sure how accurate that is.