mpg

[DAVE FERENCZ]

What is good mpg. on burb. I get between 14-16 mpg. I used to get close to 20, before rebuild. Thats US gal. for us Canadians.

[AndyL]

Hi Dave,

We need more information: year, read gear ratio, what was "Rebuilt", tire size, mileage, etc.

[DAVE FERENCZ]

Sorry, Its a 1997. I had engine, injectors, turbo,
Rad was pressure check. Same injector pump. The block is out of a 2000,I don't think that matters.
Rear end is 373. Tire 245/75/16

[slagona]

I'd say that you are in the right range for a 3:73 with stock tires. Driving habits are a big contributor to mpg. I can range from 16 to 21 mpg, depending how I drive. I normally get between 17 and 18 with a 3:42, 75% expressway driving at 75-80 mph. I can get 21 mpg if I'm willing to keep it under 65 mph - I'm not. My 4:10's all got between 13-15 mpg.

[turbovair]

I routinely get between 16-17 MPG with my pickup. I drive it sensibly and keep it under 70 most of the time. I do this with tailgate up and 4:10 ratio.I got slightly over 18 once. Thats the BEST I ever did.

[cruzer]

I did get 17mpg B4 I put a stainless steel bug deflector on the front. Now I get 15.5 mpg empty and around 11 loaded. 4l80e 4.10's. I'm pretty heavy on the thin pedal.

[Cowracer]

I put on Kennedy's exhaust system and immedeatly lost about 3 miles per gallon. Not because of the system, but because I keep whipping the crap out of it just to hear it roar!

But officer! Just listen to this....

Tim

[freddys]

Stock 1997 6.5TD 3.73 gears, 235/85/16 tires and Iam getting 21mpg on the highway and 16mpg in town and thats in cdn gal.

[ 11-25-2003, 12:37 PM: Message edited by: freddys ]

[Shad]

15-16 mpg 3.73 gears and 245/75-16 tires staying under 70mph 18 mpg at 60mph

[john8662]

16.5 MPG on 1995 4x4 burb with 4.10 gears. This is driving 70mph on flat ground with cruise control set.
245/75 R16 tires (stock size).

Things that improved my mileage:

Amsoil foam air filter
easy on the go petal.

These are heavy rigs, the extra equipment associated with the 4x4 is also a fuel eater.

[sailun]

Sad to say, I'm only getting around 15, 15.5. Thats combined, 70 on the hgwy, and around town, and about 2 hours idling per tank. Very light on the pedal. Must be somethin wrong here.

[john8662]

sailun,

Sounds like your getting average fuel mileage considering how your burb is being run. The numbers above (especially mine) are runs strait on the highway, no in-town driving. My combined mileage varies between 13 and 15 and thats with 4.10 gears. I don't let it idle that much, just look at my gauges before I turn it off and make sure the exaust temp is below 300 degrees F. 2 hours of idle is a lot of idle. These engines don't need to idle all the time, they tend to start well enough not to have to idle all the time. My advice concerning shut down after a drive is just let it run for about 45 seconds, then cut it off, if you ran it hard, a little longer. I just use the pyrometer I installed as a mod to the rig. Considering your numbers, I would say everything was in check, Next time you get a chance to run strait on the highway for a full tank then check (flat ground preferably). A 4x4 suburban with 3.42 gears should get near 20-21mpg on the highway.But more realistically probably see 19 mpg somewhat consistantly with highs near 21mpg. Wish I had 3.42's!

[dieselhumvee]

Just as a reference my 6800 pound, 5.24 geared, non overdrive, shaped like a brick 93 hummer with 6.2 NA/TH400 gets 13-14 MPG no matter if I am in town or screaming down the highway at 3500 RPMs doing 70. In no way should any GM truck get worse than that unloaded in my opinion. I wish I could get more but hey, I bought it to go off road, where it actually does quite well, I can wheel for an entire day on one tank of fuel.

[Courtableau]

I have a 1995 Z-71 pickup, An I only get around 12 mpg. I wonder what gears I have? turning about 2200rpm@70 mph with 285/75/16 tires.

[moondoggie]

Good Day!

For my pickup mpg, you might want to look at my post in What's your fuel mileage with a load? My Sub has never been accurately checked, but seems to get a little less than the pickup.

Blessings!

Brian Johnson, #5044

[Spindrift]

I consistently hit 15mpg on a recent, long trip to southern Virginia. My Burban has a 4.10 rear end. I've got a set of Bridgestone Dueler A/T Revo, 265/75 R16 (fairly aggressive tread). I use Red Line 85 Plus fuel additive at every re-fueling.

The OEM tires for my truck were 245/75 R16 and my speedo was never re-calibrated for the new Bridgestone tires. Someone once told me that I could add 15% to my current reading of 15mpg in order to calculate "true" mpg. This would give me a true mileage figure of 17.25mpg. Is the 15% add factor an accurate percentage to use?

[britannic]

I'm a lead foot and torque addict, so 15.5mpg mountain driving with 285/75-16R tires, 4.56 diffs mainly in 3rd gear, with a mechanical IP, 6.2L "J" engine and customized Banks turbo set up.

On long freeway runs with the .7 OD ratio, average is 18mpg, with a best of 21mpg when I tried really hard to keep at or below 65mph. Truck weighs approx. 5500lbs with a full tank.

[moondoggie]

Good Day!

Oops! I forgot - our Sub has 3.42 gears.

Blessings!

Brian Johnson, #5044

[cruzer]

Spindrift, Do 10 mile runs using the mile markers along side of the interstate for the 10 mile measure. Take odometer readings at the begining and end of each run. Now do the math.

[Scooby]

Originally posted by Cowracer:
I put on Kennedy's exhaust system and immedeatly lost about 3 miles per gallon. Not because of the system, but because I keep whipping the crap out of it just to hear it roar!

But officer! Just listen to this....

Tim

TIM-- I am thinking about getting Kennedy's system for my '96 1500. I dont want a lot of noise INSIDE the truck. How much louder inside is John's system than stock ?? This truck is my cruiser- I have a mud truck when I want that adrenaline rush from stomping on it !!!