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View Full Version : Gas mileage on 3400?

buickboy71
10-07-2008, 08:57 PM
Just wondering what kind of gas mileage you guys get on your 3400's. I believe mine is sub par. Also, does anyone know how many gallons of gas a 99 2dr Alero holds? Thanks
cherrington17
10-07-2008, 08:59 PM
14gal. i get ~27mpg all highway.
Beholder88
10-07-2008, 09:02 PM
My 4 door has a 14.6 Gallon Tank, and I get about 350+ miles per tank.
misslindseysue
10-07-2008, 09:04 PM
I averaged 28mpg in the summer, 25ish in the winter in my 3.4L. My drive was a lot of highway, but not all.
dragon8807
10-07-2008, 09:08 PM
i get about 27 highway and in the city i get about 14-17, but once i replace the spark plugs it should get better mileage
Beholder88
10-07-2008, 09:09 PM
I drive mostly in the city, plus I punch it quite a bit. I just love getting thrown back into my seat every now and then.
dragon8807
10-07-2008, 09:22 PM
that's one of the reasons my mileage in the city is kinda shitty
buickboy71
10-07-2008, 10:26 PM
I just got 19 city and highway and was dissapointed. Just wanted to see what everyone else was getting. Was hoping for a little better mileage.
zzyzzx
10-08-2008, 08:04 AM
I get 28MPG in suburban driving. I drive gently and inflate the tires to 40PSI though.
cherrington17
10-08-2008, 11:46 AM
I just got 19 city and highway and was dissapointed. Just wanted to see what everyone else was getting. Was hoping for a little better mileage.

check oil, s.plugs, air/fuel filters maybe run a carb/throttle cleaner through it. 19 highway is pretty low, unless you were doing like 90.

i lock my cruise control in at 65 for the whole 40mi trip.
Nate's Alero
10-08-2008, 12:12 PM
my mother gets 26 with hers, and thats hard with over 200K miles!
spinalator
10-08-2008, 01:19 PM
See the seafoam thread, and report back. I have been working 2 weeks straight and have not had time...
billytheman1188
10-08-2008, 01:23 PM
winter---18-20 mpg
summer---24 mpg
highway---34 mpg
mainard
10-08-2008, 04:52 PM
I get about 180 miles on a half a tank of gas sometimes more.
strtrydr
10-08-2008, 08:22 PM
i averaged 27.5 MPG on the highway when i drove from phoenix, az. to denver, co. and that was with AC on, the Trans in "3" the whole way, and a extremely dirty K&N Cone Filter.
buickboy71
10-08-2008, 10:22 PM
My tire pressure is also at 40 psi. The 19 mpg was half city driving. Has anyone actually ever seen a first hand increase in gas mileage after installing an aftermarket air filter kit?
Blktrax
10-08-2008, 10:32 PM
http://www.cleanmpg.com/garage/images/cha2473.png

www.cleanmpg.com

I use this site mainly to track fuel usage, im not a hypermiling nut.

And that jump was before and after plugs, wires, fuel filter, and adding 10 psi of air in the tires.
Redog
10-10-2008, 11:56 PM
19-21 city
20-22 city/hiway
32-35 all hiway

Best hiway 37