General LSX Automobile Discussion - Gas mileage?

What kind of gas mileage are you guys getting? Im getting about 16 to 17 around town with a pretty light foot, and i have an M6. Make sure to specify whether you have an M6 or A4.

m6 with a 4.10 and i get 18-20 around town and 26 last time i was on the interstate

wow whats your shifting pattern when you drive normal? I just drive 1st 2nd 4th 6th, you need to teach me your ways!

i'm an A4 w/2.73's, nearly all stop-and-go driving in my daily commute. i regularly shift at ~2200rpm's with regular runs to 3000-4000rpm's and have never seen any less than 21mpg in the month+ i've had my car.

crappy in town. avg 20 a tank, 28-30mpg on the highway.
supercharger, m6, longtubes.

mine's 17-19 in city and 25-28 on highway . . . . now my buddies 02 WS6 T/A gets 21-24 in city and 30 or so on freeway, thing's pushing 400 rwhp also!

i dont get any less then 20 no matter how hard i beat the car

average 21-22 in town and 28-29 on highway

i get about 250miles per tank..

Haha my car gets like 11 MPG, I was getting 200 miles to a tank and after I installed my lid I get 170. I drive through all the gears, I cant do 1st to 4th, but I dont even know if that makes a HUGH difference I get 11MPG and everyone else says they 20+ so I duno. I only have 27,000 miles on my car and the most MPG I ever had was driving to E-town in 6th gear down and I had 100 miles to a 1/4 tank.

I have a 6-speed 2000 SS and after the last time I filled up I did the math and I got a tad bit over 20 mpg. I pretty much followed the shifting patterns found in the Camaro manual with a couple of fast runs on the highway. But 90% of the driving was stop and go.

M6: I average around 17mpg on a tank with almost all city driving, maybe 40 miles per tank is highway. If I go light, I'll get around 19.

I drive what i consider normal...with a light foot and an occasional romping through the gears and I get 16.5 to 18.2 in the city and the best on the highway for some reason has been 21 and that was going about 70 to 75...but i have only gone on the highway that one time. My only Mod is a Lid and I have an M6.

what is the suggested "shifting pattern"

i usualy go 1-2-3-4-6 or 2-3-4-6

ummm, i am the big loser so far! i get 170 out of a tank, max, but its all in town, and mostly haulin ass whenever possible.

18-21. 45mph avg speed with stop lights. I think I like the V-8 sound too much. :jest:

17-21 In town.. and about 26 - 28 on highway at 75 MPH in 6th. with stock gears on a 2000 SS

just mod your car accordingly. underdrive pulley, lid, catback, LT's, FTRA, electric water pump, tune - all add mileage. if you get all that stuff done you'll be looking at i bet 25mpg. i know an underdrive pulley's huge for fuel savings. too bad i have a system...

i've found my car likes to be ran harder...if i shift at 2000rpm's i get 21mpg, if i run it up to 2500rpm's i get 22mpg...maybe i get into overdrive faster, i don't know...

i get about 22 mpg, average 70-80 mph all freeway/ highway miles. had the car for over a month now, but i'm thinking i can do better with a tune up. noticed a lot of carbon on the tail pipes too. trans in sig with 3.42's. my 04 imp ss was getting around 24 mpg before i got rid of it. so i can't complain, considering gas just hit $3.30 a gal.

i have a 2001 SS with m6 and stock gears. i get on average about 22 in the city and 27-28 on highway. I usually shift at around 2300 in the city

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.

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

ummm, i am the big loser so far! i get 170 out of a tank, max, but its all in town, and mostly haulin ass whenever possible.

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

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

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

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

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?

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?

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.

What kind of gas mileage are you guys getting? Im getting about 16 to 17 around town with a pretty light foot, and i have an M6. Make sure to specify whether you have an M6 or A4.
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 :burn:

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!

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

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 :judge: maybe 3 times a week.

I get about 17-21 mpg m6 3.42 gears

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

I get about 17-21 mpg m6 3.42 gears


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

Brian

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

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...

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:)

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

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????

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????

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?

I get about 14/30 on mine. I do horrible in the city for some reason i don't know how you guys are doing this 17 - 21.

:drive: I get about 14/30 on mine. I do horrible in the city for some reason i don't know how you guys are doing this 17 - 21.

I get about 28.5 on the interstate driving at about 75-80 MPH. The interstate is a little hilly.

I have yet to measure city only and I don't really want to know either. :(

I get about 14/30 on mine. I do horrible in the city for some reason i don't know how you guys are doing this 17 - 21.
This is exactly how my car is also. Not so great city mpg but really good hwy mpg, i dont understand it either and i dont drive it hard but maybe 5%-10% of the time...

Another thing, i read in the manual that the gas tank capacity is 16.8 gallons, but when i am on "E" the pump only fills it up with 13.5 gallons? Anybody else do this?

Another thing, i read in the manual that the gas tank capacity is 16.8 gallons, but when i am on "E" the pump only fills it up with 13.5 gallons? Anybody else do this?I know what ur saying, I am also interested in knowing if maybe the "E" is set early so there is some reserve??? :confused:

I dont really know what the hell i would get...cant keep my foot out of it :drive:

I get about 14/30 on mine. I do horrible in the city for some reason i don't know how you guys are doing this 17 - 21.

One reason...automatic.

They sap up more power, the TC creates slippage, and the engine is always under a load at a stop. That explains the worse city mileage ;)

One reason...automatic.

They sap up more power, the TC creates slippage, and the engine is always under a load at a stop. That explains the worse city mileage ;)


If I read his sig correctly his currently owned F-body is a manual transmissioned TA.

Seems that his A4 was sold and the other F-body listing has "!CAGS"

yeah my m6 same thing, 13-14 straight city, no hwy. City meaning, stop signs every 30ft and stoplights every 100 ft and nonstop traffic.

anyone have an early model that has the 5.7 wiht auto. I am curious to see what the mileage is on that before i buy it. 88 iroc

I get 16 in the city and 22 on the highway. I have an A4 with the 3.23. And I have a lead foot like no other, so I'm really surprised I get that good of mileage.

i get anywhere from 19-24 depending on how much city/hwy driving i do. i cant get below 18 avg mpg even when i race it at the track and TRY to waste gas lol.

i get anywhere from 19-24 depending on how much city/hwy driving i do. i cant get below 18 avg mpg even when i race it at the track and TRY to waste gas lol.
Man im jealous! Whats your secret? Have you used seafoam or injector cleaner recently?

I'm getting anywhere from 16-20 mpg in the city and pretty close to 31 mpg on the highway in my 99 WS6 T/A A4.

So what exactly is the capacity of the gas tank again? I used to have a 2000 T/A and am thinking about once again buying one as a DD and getting rid of the truck. Just trying to see what I am looking at.

i get around 18 in the city and around 25-27 on the highway....a lot better than what I got in my mustang surprisingly.

I get maybe 14 in the city and 24 on the interstate. I've never really kept track. But I know it isn't great, but then again it's not like I bought the car for the gas mileage.

So what exactly is the capacity of the gas tank again? I used to have a 2000 T/A and am thinking about once again buying one as a DD and getting rid of the truck. Just trying to see what I am looking at.

16.8 from 99+


http://media.gm.com/division/canada/english/products/pontiac/archives/2000Firebird.html

http://www.ls1tech.com/forums/showpost.php?p=1740883&postcount=5

Not sure exactly what i get since my speedo is off cause of bigger tires, but i think im around 18-20mpg doing stop and go driving around the beltway everyday for an hour each way, m6 with 4.10s

1-3-5-6 for shifting here, or just 2-4-6

Was getting 16 city, 24 hwy...then swapped cam, down to 11 city, 22 hwy...though the numbers may improve once I learn to stop burying the throttle...

19-21 city/ 29+ highway

I'm getting 24mpg city and if I'm driving the freeway at 75mph I get 32.5mpg like clock work. I did back to back checks over 10 full tanks because I was thinking no way. Oh I should list the car 1998 TA 6 speed.

Youre getting 32.5 highway?????????? geez, what am i doing wrong? Thats incredible

About 17 if I keep my foot off the throttle.

I usually get about 24-25 in the highway and about 15 all city.

Youre getting 32.5 highway?????????? geez, what am i doing wrong? Thats incredible

When I think gas mpg I short shift at 2,000rpm and in 6th gear at 50mph. I use 6th gear alot unless I'm climbing a grade, than I downshift to 5th gear. And I use cruise control as much as possible even when climbing a grade.

Last fill up I went 440 miles and use 13.4 gallons

ummm, i am the big loser so far! i get 170 out of a tank, max, but its all in town, and mostly haulin ass whenever possible.


I dunno I got you beat. I get like 180 maybe to 14 gallons = 12mpg city
I do like 280 to 14 gallons = 20mpg highway

I think I need to retune. I shift normal and I get crazy at least once a day whether on the highway or the city .

i average 18-19 in the city and 26-27 on the highway i think its pretty god for what the car is. My moms 06 civic got almost 50mpg the last trip we took i was amazed she almost made 600 miles on that tank.

autobahn slow: 29mpg
autobahn fast: 20mpg
city: 15mpg
race track: 6mpg

Ben

Youre getting 32.5 highway?????????? geez, what am i doing wrong? Thats incredible

there's a lot you can do to boost your highway mpg in an M6. first off, 3.42's are great for highway crusing. stock tires and 16" rims are good, too. big, heavy ZO6 rims on 275 tires are a no-no for highway fuel economy (it's my setup :( ). electric water pump and underdrive pullies are GREAT for fuel mpg. a fast toys ram air kit will boost it, along with better spark plugs, better wires, longtube headers and a good flowing catback. with those mods, TUNED, you will see an EASY 30mpg in an M6. shoot, i can see you pulling 35 mpg with proper driving (65mph). let's not forget proper tire pressure either. high psi means less energy to turn the wheels!

Consistently get 13-15mpg.

Probably 60% highway driving too.

:)

I got a sh!tty tune from a local shop and I still managed to get 30mpg on the highway from here to Tampa Bay and back. Around the city i got BAAAAAD mileage, maybe 10-12mpg. But I just got HP Tuners and my buddy helped me out big time so I think i'll be getting some seriously better mpg around town now.

there's a lot you can do to boost your highway mpg in an M6. first off, 3.42's are great for highway crusing. stock tires and 16" rims are good, too. big, heavy ZO6 rims on 275 tires are a no-no for highway fuel economy (it's my setup :( ). electric water pump and underdrive pullies are GREAT for fuel mpg. a fast toys ram air kit will boost it, along with better spark plugs, better wires, longtube headers and a good flowing catback. with those mods, TUNED, you will see an EASY 30mpg in an M6. shoot, i can see you pulling 35 mpg with proper driving (65mph). let's not forget proper tire pressure either. high psi means less energy to turn the wheels!

On the rear I have ZO6 rims 18X12 with 295/35. SLP ram air kit, Flowmaster cat back

On the rear I have ZO6 rims 18X12 with 295/35. SLP ram air kit, Flowmaster cat back

Ditch the flowcrapper. The Flowmaster catback for the LS1 just doesn't flow as well as the other aftermarket systems.

8mpg city 107 miles to the tank 13.2 gallons per refill and 27-28 mpg highway
car is an M6 3.42's STS t-70 42 lbs SVO injectors. When the car was stock
got like 18 mpg city and 29 mpg highway. By the way I drive 1.25 miles to work and have 15 trafficlights to deal with, so 3 miles a day I still only put gas in once or twice a month. How often do you fill you echo, or prius :jest:

LOL to one above. I too get horrible milage in town. Usually 12-14. I tried the whole "Keep Your Foot Out Of IT" thing but never seem to be able to a whole tank. I do get 26 on highway in 6th.

18 town, heavy foot, 24 highway, medium foot. A4 with 2.73s, rest in sig. shifts normally around 2500-3000 on light foot

Ditch the flowcrapper. The Flowmaster catback for the LS1 just doesn't flow as well as the other aftermarket systems.

:offtopic: If I had it my way, the car would not have a Flowmaster catback. The car came this way and I don't feel like spending money on it other than upkeep. I only use the car for a daily driver back and forth to work for the gas mileage. My toy is my truck, but it only get 17 mpg city and 25mpg hwy. Now back to the regular posting.

Man im jealous! Whats your secret? Have you used seafoam or injector cleaner recently?

that's really not that good. i'm talking 19-24 AVG mpg over a whole tank, mixed city/hwy driving. and so far my car has never seen seafoam or injector cleaner in the 25k i've put on it out of the 77k it has seen. just one more reason to go w/ an fbody over a mustang lol.

yeah im about average with everyone else i run about 200 a tank. kinda sucks but i love the sound of the V8. i drive an A4 z28 with all free mods and a flowmaster exhaust. i found the exhaust added a lil gas milage

11 mpg town 30ish highway

Finally got to do some all highway driving. Pulled in 29mpg so i was pretty excited, I get about 16-20 city depending on if my heavy shoes are on or not

M6 mixed driving 21 average for over 30,000 miles of record keeping. I have logged every drop of gas since I bought the car new. I even have a spread sheet going for all expenses. The old expression choose your battles is how I drive. I nail it (flog, beat, stomp, whail, smash) selectively. Of interest might be that my oil consumption goes up as my fuel economy goes down.

I was averaging about 20mpg mostly driving to and from work before the LS6 Intake and CAI. That was about 50/50 driving w/ the A/C on quite a bit and some WOT runs. I'm sure a plug change could help that out some though. Not quite sure what I am getting now, can't seem to keep my foot out of it recently. :jest: