Gas Mileage

[Matthew Jeschke]

All stock ‘05 Tahoe. 20.9 on long hiway trips, 15.5-17.0 mixed driving. According to the DIC.

I hate you... not really but just saying :|

I wounder what differences are. What tires do you have?

Is yours 4x4? Do you uave the 5.3 or 4.8?

Fyi this post is gd luck just filled up 16mpg best yet.

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[Matthew Jeschke]

A lot of it depends on your driving style, if you baby it around town and only go 55-65 on the freeway with a nice steady pedal your mpg will increase, me personally time is money and my time is worth more than a gallon of gas so no sense going slow, luckily I work from home. lol

Haha same here. Working from h9me def helps... altho i drive for work from time to time.. gd thi g i have anothet car :|

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[SnowDrifter]

22-24 on the highway going 55-60

18-20 on the highway going 75-80. Trip average on 300 miles, up/down a few passes

14-16 suburban driving

~10 if I'm in dead ass stop and go. Think: Idling forward in first too fast

 

[Matthew Jeschke]

22-24 on the highway going 55-60

18-20 on the highway going 75-80. Trip average on 300 miles, up/down a few passes

14-16 suburban driving

~10 if I'm in dead ass stop and go. Think: Idling forward in first too fast

How the heck, what is your truck? 4x4? Surban? Which motor.

I am jealous

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[SnowDrifter]

2005 Tahoe, 5.3, 4x4. Tune and pcv catch can. All else stock. Didn't notice any fuel economy difference with the tune but I feel it's worth including for the sake of transparency. Generally drive it in 2wd unless absolutely needed cause my front diff ain't great and I don't have the cash to fix it right now.

 

[Matthew Jeschke]

2005 Tahoe, 5.3, 4x4. Tune and pcv catch can. All else stock. Didn't notice any fuel economy difference with the tune but I feel it's worth including for the sake of transparency. Generally drive it in 2wd unless absolutely needed cause my front diff ain't great and I don't have the cash to fix it right now.

My front diff sounds HORRIBLRE lol. The passenger aide output shaft bearing is toast. I can wiggle the output shaft. 4 wheel drive still works fine tho and doesnt leak a drop of gear oil odly enough

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[SnowDrifter]

Couldn't tell you what mine is. Don't care what it is. It needs to be completely overhauled at some point, not really much point in me wasting time digging into it when the only difference is whether or nor I need to replace the gear set, which I can't tell until I get it apart anyway LOL. Apparently all of the previous shops who maintained it never checked the front diff fluid. Passenger side output shaft seal leaking. Was just the side of bone dry when I got it.

My output shaft bearings are OK. It's only a nasty noisy thing in 4wd under load.

 

[Spaceman Spiff]

I hate you... not really but just saying :|

I wounder what differences are. What tires do you have?

Is yours 4x4? Do you uave the 5.3 or 4.8?

Fyi this post is gd luck just filled up 16mpg best yet.

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4x4. 5.3 continental adventurer a/t tires. 136,000 miles. i did see 22.2 on a 120 mile one way trip, but wasn't sure that was believable.

you could just have crappy gas in your area.

 

[adriver]

Sounds like the front diff is causing some of it.

I would guess 265 is not the stock tire width, that's causing more friction. I had a buddy who had an OBS reg cab many years ago. I remember he said he got 20 or 22 mpg (I don't recall exactly), but he put on a 6" lift and 35" tires. Did nothing else, and said he was lucky to get 8mpg on the highway.

Do you get dust storms down there; how's your air filter?

AC is more efficient than having your windows down, at highway speed, but both hurt.

Any chance you need an alignment?

Tire pressure?

 

[Matthew Jeschke]

My tire pressure is at 32 per tire.

Ac filter is clean but i want to get a cloth one.

Yeah diff sounds something horrible. I know is at least one bad bearing. However when i jack front of truck up the tires spin without trouble / friction.

They last guy leveled truck with keys / spacers for front. He raised 2". I have lower back down 1". Definately made a difference in mileage.

I should probably lower back down the extra inch.

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