neilcolwell

from the title i think you all get the idea...ive had my auto g5 for a little less than 12 months now and it has about 10,000 miles on it. My only performance mods are an injen cai and a magnaflow catback exhaust. I do pretty much all city driving and always fill my car up with 91 octane and reset my dic everytime. AT BEST, i'll get around 20mpg with some highway miles in there, but its usually right around 19. I don't really beat on it at all and just cant seem to figure out what i can do. I took a 250 mile highway trip from pa to ohio last weekend, and i only averaged about 28mpg roundtrip with my cruise set at like 75mph. Ive read all these posts with everyone getting 350-400 miles out of 1 tank, but im always right around 250...anyone have any ideas as to what i can do?

g5mike

WOW! you should take it to the dealer

Evil C

Hey Im getting an average of 19.6 mpg also and all I have done to my car is is the GMPP CAI. Same deal mostly city driving ive got about 2400 miles on it i was just attributing it to needing to be broken in. Lol i live 3 min from work and have to fill up every other week on a good weekend i may put on 50 miles.

neilcolwell

i took it to the dealer and they asked what i expected them to do about it...i just expected them to blame it on the mods or how i drive

Evil C

Heh People @ dealerships are the worst kind of people. My balt got broken into via a screwdriver or similar tool to pry open the passanger side door and got slim jimmed. Alarm never went off and onstar never did their thing and the car sustained 600+ dollars worth of dmg to paint, door, weather stripping. I went to the dealer to see what would be covered under the warrenty and Just Why the F my alarm never went off. The guy @ the dealer ship Yelled @ me to go to the service department. So i went there and the service department guy told me that break ins are not part of warrenty work. Which is an acceptable answer but when i asked about the broken sunroof switch he pawned me off on Teds Auto Body then he took off. WTF did i pay for a 60000 or 5 year "bumper to bumper" warrenty for?

LewiSS

I never got 28 with mine. I did get around 22 driving it to work, but that's mostly highway at about 65. It would get about 20-22 in city traffic.

silentgarth

Do you reset the MPG or just the trip reading? You should only reset the trip reading not the MPG read out. Also the Auto will tend to get less mpg than a stick. My wife and I have the exact same car ( except I have a drop in K&N filter and bosch +2 and her's is stock) she gets about 3-4 mpg better than I do But she also travels farther on the highway than I do. And I drive mine hard and average aroud 24.5-.8 mpg

Try using a good fuel injector cleaner. And or go to an automotive parts store and oick up a Mass Air Flow Sensor cleaner. These might help out your problem.

CASol

75 mph is your problem. the car does its best at around 60-65(depending on wind, grade, load, etc) City driveung will always be your worst MPG's. If you do alot of city driveing you need to take it out and run good to reduce the carbon buildup which will make the car run better. No matter what modes you do or babying the accelarator, city driveing does not do good on any vehicle, except electric
I have the same car you do and i have a lil over 6k on it. I usually get on average 27mpg to and from work and thats with a steep grade back up to my house(mind you that the mpgs get to about 35mpg going down hill and 23mpg going up in 3rd)

Dragonsfire12345

iTrader: (1)

I get about 300 miles per tank

KillerBee

Couple things it can be

1 dont lay into the gas pedal so much

2 buy a locked gas cap someone is snatching your ****

3 you got a gas sucking lemon

avro206

I am getting 26 US MPG in the city

Jackalope

I get in the 34 range on the highway at about 65 with the cruise set. Yeah I'd say somethings wrong.

Tell the dealers service manager to follw you, walk to the new line of Cobalts find a 2.4 and point to the EPA thing on the window sticker and say "here make this happen since its what your advertising"

Remember after 3 strikes LEMON LAW!

neilcolwell

ive had my car for almost a year now...is the lemon law even applicable after that long? and how can i make 3 strikes happen? ive had so many problems with my car already...my rotors were warped after like 8000 miles and they wouldnt even replace them....i just took my car to the dealership last week to get inspected and the service manager just replied "well there's nothing we can do about that"

Jackalope

You need to check into your state lemon law cause they vary from state to state. But it sounds as tho you may have a case for it even if you do have to go thru a different dealer since this one is unwilling to do anything except take your money.

neilcolwell

no state covers a problem with gas mileage under their lemon law...i just checked into it.
Since its an estimate and varies based on driving conditions, they won't do anything about it. sucks i know

Jackalope

5 gallons of gasoline and a match then?

06G5GT

28mpg @ 75mph is very reasonable if you take into consideration the EPA MPG numbers and speeds they test at.

I get 22-23mpg city driving as well. In a 7km drive, I usually hit 6 red lights. Stop and starts use the most fuel.

celicacobalt

i only get about 22 mpg, im pretty sure thats normal for aggressive driving that i do.

DarkSergeant

Wow... My 2.4 gets around 30 mpg at an average of 70 mph on the highway. Mileage really improved after about the 2,000 miles. My average combined mpg according to the DIC is about 26 mpg, I have a commute that's about 18 miles highway and 5 miles city each way.

My ss/sc gets about 29 when cruising 65-70 on the highway, substantially worse when driving aggressively. SS/SC is averaging 23 mpg but has fewer than 500 miles on it.

roccobladr

i would do alot of city driving and only got around 20-22. im auto too

Evil C

lol i took out that intake muffler and it popped me up like 4 mpg which tells me I was laying too much into the gas when it bogged down. WTF was the point of that poorly attached Space holder?

wordsthatiwrote

I had the same problem with my rotors. but i drive my car HARD. I took it in and i was honest with them and they covered the cost of getting the rotors turned or replaced. I am not actually not sure which but at any rate. Ganleychevrolet has been pretty good to me considering i broght my car in with mods on it. Recently removed but i digress. I dont see why they would not fix that.

neilcolwell

the dealership "resurfaced" my rotors with like 7900 miles on my car after a week of fighting with them about getting me new ones...now with around 11000 miles im having the same problem and theyre still being shitty about replacing them...would it do any good to maybe threaten to call a regional service manager?

thatdaveguy

...wow I'm glad I don't get your guys numbers...

Today, 270km trip about 85% highway I got 37.3mpg. That's my best ever, but 34mpg is typical for this trip.

That's 70mph for most of it, city part is freeway with traffic lights (sucks)

tsunam1

I drove about 1000 miles straight through (went home for vacation) and got 29mpg, all highway but through West Virginia mountains too, that was @ 75 on cruise. Around town I average about 22. 2.4 auto.

The rotors on the 2.4 are crap, I just went ahead and replaced them with EBC slot and dimpled rotors shortly after I bought the car. No warp issue and I am hard on them, redstuff pads too. Way less brake dust. Yes you can turn the EBC rotors on any standard ammco brake lathe, which you should do when changing pads out.