Chevy 6.0 MPG????
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Chevy 6.0 MPG????

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    Default Chevy 6.0 MPG????

    I just bought a 05 2500HD. Its a crew cab long box. On the trip home it got 15. Im wondering if one of these K&N air cleaners really will help. Or does anyone else have any other ideas? I really think the 15 was pretty good but hell Id like to see 17 if possible.
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    Senior Member ultra26shadow's Avatar
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    Quote Originally Posted by Dansblown73Nordic View Post
    I just bought a 05 2500HD. Its a crew cab long box. On the trip home it got 15. Im wondering if one of these K&N air cleaners really will help. Or does anyone else have any other ideas? I really think the 15 was pretty good but hell Id like to see 17 if possible.
    they are gas guzzlers gets worse when you tow. I had the K&N FIPK kit and headers and exhaust and the Superchips tuner it helped a little but never saw 17 MPG. Mine was a 04. The new engines 08 and above I heard are much better as far as MPG and HP.

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    Quote Originally Posted by ultra26shadow View Post
    they are gas guzzlers gets worse when you tow. I had the K&N FIPK kit and headers and exhaust and the Superchips tuner it helped a little but never saw 17 MPG. Mine was a 04. The new engines 08 and above I heard are much better as far as MPG and HP.
    i like the bolt on stuff you mentioned as well, but i've never seen ANYONE truely get a mileage increase from a programmer unless it was diesel. the bolt on's will free up airflow and surely help with mpg.

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    Member Get415's Avatar
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    Are you calculating urself or is that the dash computer display. I had an 05 2wd and my dash computer was never above 12mpg. Usually around 11.5, and forget about towing, that was around 9 if i remember correctly.

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    The Insurance Guy millhouse961's Avatar
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    Don't know if this helps or not, but i have an '07 GMC 6.2L and I can get 19mpg on the freeway if I set the cruise control at 69-70. It's do-able but you have to drive really conservatively. Day to day I average about 15
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    Best thing you can do is get it tuned. Not a handheld tuner, but actually tuned out on the road with a reputable tuner familiar with GM Gen III-IV engines. It really wakes the truck up, and they can lean out your cruise A/F ratio substantially when the truck is on the freeway, especially under light throttle - light load circumstances. GM tunes them on the rich side, they have to compensate for manufacturing tolerances, CARB emissions certifications, etc. But a tuner can get the optimal mileage and power put of your truck. They will Data-log it, drive it around varying the load and driving conditions and record the data. Then make changes accordingly, drive it again, repeat, etc etc untill its on the money. I did it to my dad's truck recently, he has a 2000 Sierra 1500 extra cab that I swapped a LQ9 6.0 into. He was getting 14-16mpg freeway, now he easily gets 18+ if he keeps it under 75. The 6.0's dont get the mileage the 5.3's get though, the 5.3's with a good tune will pull 20mpg @ 70-75 freeway unloaded. Smaller bore & Heads on the 5.3, but same stroke
    “I am on a drug. It’s called Charlie Sheen. It’s not available because if you try it, you will die. Your face will melt off, and your children will weep over your exploded body.”



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    deckboat owner rschap1's Avatar
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    I had a 2001 and I think that you are doing good!
    I was only able to 6000 miles on mine before it went back as a "lemon", but city driving never got over 13 mpg. Highway about same. Towing a 20 foot, maybe 3500lb. boat/trailer/gear package didn't effect it much. Maybe dropped to 12.

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    Senior Member Uncle Dave's Avatar
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    Quote Originally Posted by Dansblown73Nordic View Post
    I just bought a 05 2500HD. Its a crew cab long box. On the trip home it got 15. Im wondering if one of these K&N air cleaners really will help. Or does anyone else have any other ideas? I really think the 15 was pretty good but hell Id like to see 17 if possible.
    2wd or 4x4?

    UD

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    I had an 04 and it only 12 on a good day. About 8 towing my toybox.
    I may be growing older, but I refuse to grow up!

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    Senior Member lake p.a.l.'s Avatar
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    04 Burb 4x4 6.0 gets 11-12.7 highway & 7.1-8.0 towing 8500lbs, these are all highway #'s and 6.8 towing to Lake Powell. Now we only use the diesel for Powell trips

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    Senior Member 77charger's Avatar
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    Why waste the money on a k&n filter its not going to really improve your HP or your mpg.Just stick with the stock filter besides it will filter better anyways.

    The only good programmers i have heard ab out are the custom tuners like mentioned by another poster.The plug in type like hypertech wont do much.

    As for mpg i have a 4x4 i get about 13 all around avg empty.If i stay on fwy and drive 65 i am sure i can get a tad over 14 but i dont drive steady 65.

    Towing toyhauler loaded and truck too i get about 9 if no head winds.Headwinds its probaly about 6-7.I also have a lance 8.5 camper i use in the summer towing 21ft boat i can get 10mpg if i keep it at 60 driving from oc to needles.But increase to 65 i can barely make it to blythe.

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    New here Beer:30's Avatar
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    I have never heard of a 6.0 getting TRUELY over 15. Even 15 is pretty unheard of, so if you are really seeing 15 now, I wouldn't really touch it. 13.5 is about the best all of my friends can get with theirs. Even my dads '06 5.3 1500 2wd is 14.5-15 TOPS (avg). An intake will perk it up a little, but not add any mileage. A tune of any sort will help, but you will be throttle happy after that, so you may want to just stay where you are.
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    I will explain. I filled this truck when I picked it up in Pittsburg PA. I drove it 350 miles home 68-70 on the highway and I refilled it. I got 15.12... Something. I thought it was pretty good with 4.11 gears. This is a 3/4 ton HD 4x4 with a long box. But in my little mind if it got 15 it can get better....

    This tuning you guys talk about. Is that something a dealer could do? I have a good friend that is a Tech who can borrow the GM hand held. Will that work to lean out the settings? Who is a TUNER?

    I found this truck web site where these guys cut the screen out of the Mass Air Flow,Drill the air box full of holes. All kinds of Bull Shit to try to gain M.P.G. Now Im sure the computer could be leaned out some that makes alot more sense.

    This is the reason I would never buy a Diesel. You pay 5-6K more new or used to get one. They cost a fortune to service. And they get a couple more miles to the gallon MAYBE!!!!! They do have more power but for what I towe it would never really matter.

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    Quote Originally Posted by Dansblown73Nordic View Post
    I will explain. I filled this truck when I picked it up in Pittsburg PA. I drove it 350 miles home 68-70 on the highway and I refilled it. I got 15.12... Something. I thought it was pretty good with 4.11 gears. This is a 3/4 ton HD 4x4 with a long box. But in my little mind if it got 15 it can get better....

    This tuning you guys talk about. Is that something a dealer could do? I have a good friend that is a Tech who can borrow the GM hand held. Will that work to lean out the settings? Who is a TUNER?

    I found this truck web site where these guys cut the screen out of the Mass Air Flow,Drill the air box full of holes. All kinds of Bull Shit to try to gain M.P.G. Now Im sure the computer could be leaned out some that makes alot more sense.

    This is the reason I would never buy a Diesel. You pay 5-6K more new or used to get one. They cost a fortune to service. And they get a couple more miles to the gallon MAYBE!!!!! They do have more power but for what I towe it would never really matter.
    Drilling the airbox with holes just un-restricts the flow to the filter, if you do that and put a K@N drop in along with it, you will feel the difference in low end torque and throttle response. Its the poor mans version of buying a full cold-air intake kit. It does work, you can feel the difference for sure. Guys de-screen the MAF sensor to remove the restriction it causes in airflow. However, the screen is there to "straighten" the airflow over the sensor leads that sit in the middle of the air stream. Some guys swear it helps, others feel no difference. One thing i do know, is that when you descreen the MAF the computer winds up with a slightly more aggresive timing curve, and I think that is what people are feeling when "seat of the pants" testing. The biggest thing to help your mileage would be a custom tune, but your 4.11 gears are going to hurt you in the MPG dept. With those gears, you might get it up to 16 or so. Those couple extra hundred RPM on the freeway make a big difference. You can try running a taller tire to bring the ratio back down, but keep the tire skinny and the tread not too agressive
    “I am on a drug. It’s called Charlie Sheen. It’s not available because if you try it, you will die. Your face will melt off, and your children will weep over your exploded body.”



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