2014+ Gas Mileage (MPG) Topic

[Eddie 70]

Another picture of the MPG with 6000 miles on it. I think maybe the drop in MPG is probably winter gas. Still happy with the results here!!

 

[foo.c]

Drove down to Houston and back for some tuning via Blackbear. Set a new record on the way and just barely beat it on the way back.

 

 

 

[m3n00b]

This 6.2 continues to impress. Did an 80mi round trip to check out some kitchen cabinets at 70-75 and managed 25mpg avg with almost 28 during my best 25mi. I don't know how this is possible with 420hp and 3 tons.

 

Also this is without the front air dam and the exhaust valve clamped open.

 

 

 

-tapa

Edited March 6, 2016 by m3n00b

[jonboy77]

I know people will ball BS but I was getting 18-21 mpg stock with just a level. Now I have 22" wheels and 35" Toyo MTs. Of course it went down tremidously-12-13MPG. I have t had it done long but the last fill up with 91 and tuned with my Diablo I was at 19 mpg.

[Sierra Jon]

Another picture of the MPG with 6000 miles on it. I think maybe the drop in MPG is probably winter gas. Still happy with the results here!!

 

This is great! Is this because of a tune? I've been able to get mid to even high 20's but that is only in 25 mile intervals.

 

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[Eddie 70]

This is great! Is this because of a tune? I've been able to get mid to even high 20's but that is only in 25 mile intervals.

 

Sent from my Nexus 6 using Tapatalk

 

No tune. Just stock 5.3 2wd extended cab. I just passed 10000 miles and I am still at 24.1 MPG.

[Sierra Jon]

 

No tune. Just stock 5.3 2wd extended cab. I just passed 10000 miles and I am still at 24.1 MPG.

And a whole lot of discipline! Damn. Between remote starts in the winter and towing in the summer I can't get my overall average up nearly that high.

 

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[tyrich88]

I know people will ball BS but I was getting 18-21 mpg stock with just a level. Now I have 22" wheels and 35" Toyo MTs. Of course it went down tremidously-12-13MPG. I have t had it done long but the last fill up with 91 and tuned with my Diablo I was at 19 mpg.

Thats awesome! Do you have a custom tune from Lew? Or just one of the standard diablo tunes?

[cbrsilv15]

Son of a..... My commute is mixed highway and back roads and I only average 16.2-16.4... Stock CCSB 4x4. Only have a K&N panel filter...

[cmysstailights]

I get avg 12 mpg e85 80% s stop n go.

 

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[Txjose]

Son of a..... My commute is mixed highway and back roads and I only average 16.2-16.4... Stock CCSB 4x4. Only have a K&N panel filter...

Dont worry.... With 33s on stock everything i was avg 18 and now im down to 14ish hwy... About 9 or 10 city with the mods and on a light foot.

 

But ehh its a truck. Cant wait for my 5mpg while towing numbers lol

 

Sent from my Note 4 on Tapashit

[tyrich88]

Just going to state that where you live makes a difference in these MPG numbers.
If I were to post numbers from my commute to and from work, I average 12-13 if I only drive to work and back. It's a 2.5 mile trip with 5 stop lights.

But on the highway I get around 16-18 with 10 ply 275/70/18s, a 2" level, grill guard, intake, exhaust and topper. It all depends on environment and speed of the commute. and... how you drive. I can drive my commute to work the same way for a week and my 25 mile average can be 17 or all the way down to 10 depending on how i drive it. So take these numbers with a grain of salt.

I've driven quite a few of these new body GM pickups, probably 10 or more, and they have all been very similar in mpg, if not identical, with a stock set up.

[cNate]

I have a '14 SLT CCSB 4x4 with 5.3L and 3.42. I drive 15mi round trip per day for work and it is up and down a 6% grade. I average 14 mpg just driving back and forth for work and some around town on a tank of gas. Lifetime MPG at 23kmi is 16 mpg. When I am cruising at 70 on a flat freeway, I will get 21ish MPG. I do a regular drive (2x per month) from sea level to 7500 ft in the Eastern Sierra Nevada's. It is a 660 mi round trip and I avg 19.5 (17.5 there and 21.5 back)... this is at 75 MPH avg. Add or subtract 1-2 MPG depending on if you go 65, 75, or 85.

[Snoringbear]

Back in Memorial weekend 2015 I traded my 2008 Silverado 5.3/4 spd CC for a 2015 LTZ 6.2/8 spd 4x4 CC. I was actually shopping for a 5.3/8 Spd but upon learning this combo was not yet available I bought the 6.2/8 spd. No offense to my trusty old 2008 as it went about its daily chores reliably and without complaining - except when being asked to tow my 25' TT that is ... Anyway, the 2015 6.2/8 spd combo is a huge improvement as it delivers better mpg as a grocery-getter and a big mpg improvement when towing "and" with no complaining ! Now, when road tripping with my TT hooked up I just set the cruise on about 68 mph (seems to be the sweet spot) and sit back and enjoy the ride. Nothing like big V-8 power and torque matched up with 8 forward gears! Anyway, I'm a happy camper for sure Lol!

[cNate]

I have a '14 SLT CCSB 4x4 with 5.3L and 3.42. I drive 15mi round trip per day for work and it is up and down a 6% grade. I average 14 mpg just driving back and forth for work and some around town on a tank of gas. Lifetime MPG at 23kmi is 16 mpg. When I am cruising at 70 on a flat freeway, I will get 21ish MPG. I do a regular drive (2x per month) from sea level to 7500 ft in the Eastern Sierra Nevada's. It is a 660 mi round trip and I avg 19.5 (17.5 there and 21.5 back)... this is at 75 MPH avg. Add or subtract 1-2 MPG depending on if you go 65, 75, or 85.

 

After reading about folks getting 24 mpg, I had to see if I could replicate this with my truck. I am adding this to my first post so you can see the vehicle setup (engine, gears, etc.).

 

Here are the conditions of the test:

 

I had a 90 mile round trip this weekend to visit friends in Santa Barbara, CA.. I did all freeway tracking for this MPG test. I drove along the coast with a mostly flat road (628ft ascent and a 667 descent one way). I babied the truck like I did when it was new (no full throttle!). <-- I had moments where I forgot and got on it a bit.The weather was clear skies, almost no wind and upper 70s. I used the dash as well as a GPS tracking app.The goal was to maintain 72 MPH but I hit traffic both ways, more so on the way there.

 

Here are the results: