BlueSix

i used to get about 15 in my '02 ws6, lots of city driving. I'll average 20 in the GTO with a 50/50 mix of city/highway. '02 was an A4, GTO is an M6, slightly shorter 6th than the f body's have.

blkZ28spt

10-12 mpg around town, 24-25 mpg on the interstate.

98s have a smaller (and heavier) tank than the later years so don't worry too much about mileage per tank.

iverson387

im lucky if i get 8 to 10mpg. all city driving and lucky to get 20 on highway wtf im starting to think sumthing is wrong

oneBADDz

iTrader: (26)

uhhhhhh, that's horrible man, something is definitly wrong

old and good

iTrader: (3)

i have realy bad sparkplugs. medium heavy gas foot, i have avaraged 13.3mpg the last 2 tanks. the tank before that (the first day i got my car) i dont know if i shuld post this..... f*** it i avaraged 6.4 miles per galon

Specialized

iTrader: (15)

Im looking into a 99 M6 Z28 with (gears- the guy is looking up what they are in there), catback, a lid, and a tuner and basically thats it for performance mods. Should I be able to tune the car with the Hypertech to be able to get maximum gas mileage while still being able to quickly(and easily) change it back to a race mode/race gas fuel map?

jmm98LS1

iTrader: (28)

Do some research on this board before making any decisions on buying mods....the hypertech is good for nothing more than fan settings and gear ratio changes.

I get around 15-16mpg city/highway mixed. Used to get around 20 when stock.

300bhp/ton

Not being funny at all, but who really gives a chuff. It's a V8 powered muscle car.

Working the mpg out won't make it anymore economical. If it needs fuel just fill it up or park it up

92SilverSHO

iTrader: (3)

if you guys get anything over 15-16 pure city your lucky. Come to Montreal, worst traffic ever!! I get about 17 with stop and go/hwy. Thats not skipping gears and not beating on it at all. Short trips kill my mileage as well. When i hit the gym, its about 3 miles away, but theres like 20 lights and 20 stop signs, i get about 13mpg pathetic!

00slowredz

i get like 20 driving city and badly congested highway....got 26 once....never again, theres too many hondas with fartcans runnin around

LS1T/A4

iTrader: (3)

98 Z28 3.23 Auto, I get on avg 21mpg, about half city half highway and I dont drive during rush hour times, also visiting the top of 3rd maybe 3 times a week.

BlackBADaSS02

iTrader: (17)

I get about 17-21 mpg m6 3.42 gears

RDISADEIFAN

I get 20-22mixed diving(90%highway,10%city) and 24+ highway.A4 with3.23

Hagarr

iTrader: (6)

Same here. All city driving...the best so far is 21 mpg city while being a good boy the whole tank.

Brian

ksuburban

auto, I get a little over 19 mpg with the ac on all the time

TLUZLS1

iTrader: (6)

Well im getting 15mpg avg with all city driving, i dont know what the deal is. I also found out i have a tornado when i was doing the fernco mod, so i guess those dont work...

miamifan3413

iTrader: (1)

3.42 gears, lid , catback, Hooker shorties, Jegs cutout, chromoly 13lb flywheel, Luk zo6 clutch and i get about 18-20mpg in city & 26-28 highway.....about 280-300 miles to tank of gas w/ mixed driving

Starz T/A 17

iTrader: (6)

Just drove me new Z back from chicago and it got 29 MPG, its a M6 with 342's

mpe488

Threads like this and 'whats your current rwhp' both hate me.

I only get like 13/23

I'm starting to think I'm tuned very rich but I haven't touched the ECU, and I'm pretty damned sure the last owners didn't.. both were 45+ year old ladies.

Anyone????

blkZ28spt

If you are getting 13/23 mpg and only put down 271 rwhp, even in an auto 98, something is amiss. New spark plugs? No exhaust leaks? Otherwise running fine? Your 1/4 times are what they should be, considering the 60'.
Did you get a wideband hooked up for your dyno pull?