Mileage


waynem451
04-07-2005, 01:54 PM
What are you folks getting for mileage? My 04 Z71 w/ the 5 cylinder with auto trans is getting a constant 19 MPG on the highway and I drive it very conservativly. The sticker says I should get 26. I know that's optimum but I seem to be far below their claims.

b-lodo
04-13-2005, 11:48 PM
Mines an '05 and it's getting about the same. I thought it should be a little better than that. If thats all its gonna get, i wonder what an intake would do for it.

UpstateNYColorado
05-03-2005, 01:47 PM
I have a 2005 Z85 LS ext cab 4x4 with the 4 cyl motor ( 5 speed ) and I average between 23mpg and 25mpg driving back and forth to work. However on a trip from NY to MD I averaged only 21 mpg on the highway because I kept having to drop to 4th gear to get up the hills.

Philo
05-30-2005, 08:38 AM
I have an '04 std cab/I5/Auto/air/4x4/Z71. The best for me was 24.9 MPG average over three consecutive fillups on a trip from NY to GA. For the most part, I drove five to ten over the limit. I stopped checking after that. My S10 4.3 never got better than 22 MPG in 175000 miles.

The other thing - I have heard in the past that a red vehicle attracts a lot of attention from the police. My S10 was blue/silver, but with the Colo (red), I don't notice any extra attention.

Joe P
11-11-2005, 03:38 PM
I am not sure the exact mpg, but when I first bought it at the end of August 04 I was only getting about 300 miles before a fill up when the low fuel light came on.This past spring I was going about 360 miles before a fiill up which I was happy about but now for some reason it is back down to 300 which is about 15 mpg. I thought maybe there was a break in period but now I don;t Know. It is a 5 cyl. Any one with any ideas? Unless some one has been siphoning gas from me I don't know why the mileage varies so much, it is all the same type of driving conditions.

Philo
03-28-2006, 12:10 PM
I finally checked my Colo mileage with local driving. Over 280 miles, I got 21.1 MPG. This was with mostly 20-55 mph driving and a couple of ten mile trips at 70 or less. Lots of hills and red lights [none flashing though :) ]. It is an '04 std cab, I5, Auto, Z71 4X4, w/3.73 axle ratio. My best highway only MPG as stated in previously in this thread was 24.9 MPG.

RahX
03-28-2006, 04:13 PM
my first tank of gas and im lookin at about 250-260miles from full. this is a dealership fill so im not sure if they got a full tank in there but its lookin like 13-14mpg assuming i used 18gallons ><

Philo
04-07-2006, 05:08 PM
my first tank of gas and im lookin at about 250-260miles from full. this is a dealership fill so im not sure if they got a full tank in there but its lookin like 13-14mpg assuming i used 18gallons ><

The problem is that the fuel guages are not very accurate. They are just good enough to keep you from running out, and making you feel good when it is on full. You need to fill it yourself, set the trip meter, drive it for at least a couple of hundred miles, then fill it again yourself. Then you will know what your getting. Also, you should not let the tank get much below the 1/4 tank mark, so you don't run the risk of running the fuel pump dry. It is cooled with fuel and doesn't like running dry ($$$$$$).

RahX
04-09-2006, 11:34 PM
I know all about running it too low. As far as the gauge goes, its fairly accurate and as of now my last two fillups were 16.5mpg 90% city and on my last trip to ky i got 21/20 so its probably a combo of break in + dealership being stingy.

sctrain
04-19-2006, 10:29 PM
2006 Z71 4 x 4 5 Cylinder, approximately 1200 miles, measured the last two fill ups, 20.4 on both, includes about 35 miles of daily interstate (65MPH) and 12-15 miles rural (35-55), any other 2006's?

RahX
04-21-2006, 04:30 AM
Mine is an 06 auto 3.5 Xtreme w/3.42 locker.

RalphT
04-23-2006, 12:46 AM
I inflated my tires to 45psi. I get about 27mpg now with my I4 SLE Ext.

wrparks
05-19-2006, 08:12 PM
It's a shame that it sounds like the I5 doesn't get much better mileage than the full size silverado. Mine silvy averages about 19 mpg and has gotten 22 or 23 if I'm being a slowpoke. But hey, at least you can park in the front of the lot.

RedRado14
05-20-2006, 08:35 PM
I have a 2005 I5 4x4 crew cab, I get about 19-23mpg, depending on the driving. And I really don't baby it on the highway, and I drive between New York and Massachusetts weekly. During the week, I drive it to the grocery store once and that's about it.

BlenderWizard
05-02-2007, 09:07 PM
It's a shame that it sounds like the I5 doesn't get much better mileage than the full size silverado. Mine silvy averages about 19 mpg and has gotten 22 or 23 if I'm being a slowpoke. But hey, at least you can park in the front of the lot.


Yeah, I need a truck (I am a home builder), and my Silverado is eating my lunch on gas. I was hoping the Colorado would be a nice alternative with better MPG

RalphT
05-02-2007, 09:51 PM
Yeah, I need a truck (I am a home builder), and my Silverado is eating my lunch on gas. I was hoping the Colorado would be a nice alternative with better MPG

Better MPG...yes. Nice alternative...depends on how much you want to haul.

Sadly some people don't understand that most of your fuel is used up in stop and go traffic. With a smaller engine it needs to burn more fuel than it normally would if it was in a lighter vehicle. Since a bigger engine can produce more torque it will actually use less fuel to get up to the same speed in the same amount of time. However if you are always gunning it at the stop light you will always see a parallel increase in fuel usage. So in a sense it really depends on how bad you want to get up to 70mph on the highway and how much you want to tow.

sctrain
05-02-2007, 11:23 PM
2006 Z71 Crew Cab, I5, 19-20 on the highway (65-70), I have gotten 21 cruising at 65, If I drive like my elders....which is hard for me to do....that is 55 or less, it seems to get 21-22....

tri-power
05-03-2007, 01:54 AM
07' Z85 I4 5 speed Purchased new in Nov got about 21.5. Since adding a hard Tonneau and sandbags for winter driving, Approx. 250lb. Mileage dropped to about 18-19. This is mostly rural driving with a lot of hills. Haven't tested it on a highway trip yet.

BlenderWizard
05-03-2007, 03:41 PM
Better MPG...yes. Nice alternative...depends on how much you want to haul.

Sadly some people don't understand that most of your fuel is used up in stop and go traffic. With a smaller engine it needs to burn more fuel than it normally would if it was in a lighter vehicle. Since a bigger engine can produce more torque it will actually use less fuel to get up to the same speed in the same amount of time. However if you are always gunning it at the stop light you will always see a parallel increase in fuel usage. So in a sense it really depends on how bad you want to get up to 70mph on the highway and how much you want to tow.


I'm getting 19 on the highway in my Silverado, and that is based on 4 months worth of MPG records.

SCtrain says that's all he's getting in his Colorado. Guess I'm stuck paying $600 a month in gas.

I would have to have the I-5 with a crew cab if I were to get one. Sounds like the MPG on those is similar to what I'm getting in my Silverado.

bwinterstine
05-23-2007, 07:08 AM
I've got around 800 miles on my 2007 Std Cab, 4 Cyl Automatic. I'm getting 24 on the highway and 20.5 around town...not bad at all. I just put a cover on the bed and hope that the highway mileage will still improve.

jaws38
09-17-2007, 07:29 PM
I have Colorado with 44K miles on it. Was getting 21 mpg previously in highway situation.

I just got recall for gas filler neck replacement. Took trip to Iowa from East Coast. Got 25 mpg across flat Midwestern states at 60-75 mph. Got 24 mpg through mountains of PA.

I suspect vacuum was not maintained in gas tank previously.

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