2014+ Gas Mileage (MPG) Topic

sourdough44 · April 22, 2014

I switched from a 2003 6.0 gas 2500 to the 2014 5.3. Rough numbers with just a 5 mpg improvement show a $1,000 annual fuel savings with 15,000 miles a year. I will most likely have less miles though as we drive our other cars more.

Inacanyon · April 22, 2014

Ok, we returned from the trip that we went on. The raw data after filling up for the above pictures 380 miles total before starting trip. The truck took 19.5 gallons and mpg worked out to 19.48 mpg on the 1st tank. Here are some pictures of the trip that had about 250 miles of mountain driving and flat land driving the rest of the way for a total of 1154 miles. So it works out this way. 1154 - 380 = 774 miles for the trip. On the trip we burned 37.5 gallons of gas for a gas mileage of 20.64 overall.

The best of it.

The part that has the most wow took place on the flat land. It was a reduce speed zone that went forever. The posted limit was 55mph and I set the cruise at 57mph. The CHP had people pull over on both sides of the freeway. In case you can't read it because the road was rough. The current mpg on the left said 28mpg. The best at 50 miles was 25.7 mpg and the avg. was 25.7 mpg

For the best 25 mile club went to this picture. Cruise set at 70mph. That was on flat land driving near Delano, CA on Interstate 99 going to Bakerfield, CA.

impressive for sure. if you don't speed with these things, they are unbelievable.

Newm · April 22, 2014

Just picked up my new truck yesterday out of state so I had a 248 mile journey home. Its a 4X4 Denali with the 6.2 and once I was outside of St. Louis rush hour traffic I was running 75 to 80 most of the way home. Figured at the pump I averaged 18.48 MPG...Display showed 18.6. I am tickled pink with these numbers on a brand new truck that had 6 miles on it when I left the lot. The motor feels tight and I can only imagine it will get better with some mileage.

Bikewhisperer · April 23, 2014

I got tired of the uphill battle with my fuel economy and basically got a buy back and got the 2015 2500 denali. Getting 3mpg better than my 2014 with 3.08 gears after the first 250 miles.

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strike1st · April 23, 2014

I got tired of the uphill battle with my fuel economy and basically got a buy back and got the 2015 2500 denali. Getting 3mpg better than my 2014 with 3.08 gears after the first 250 miles.

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When did you do that?!

Bikewhisperer · April 23, 2014

Monday. It sure feels Iike a truck with the 4 or so inches higher and the stiffer ride. Got 18mpg on the drive to town this morning. Woot!

Don't get me wrong, I know the truck costs more and the maintenance is more. I'm not thinking this will cost me less long term, but I made a sacrifice in usability with the last truck for fuel economy and was keeping my old 2500 for heavy stuff. Now I can sell it.

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nvrnuf4me · April 23, 2014

I thought I would chime in and share today's mileage. Just so it's known, my commute to work from my house is 3.5 miles of dirt road to 40 miles of freeway driving to 4 miles of light to light. I have a Silverado CC SB w/ 5.3 and 3.42's. My normal average has been consistently between 20 and 22 mpg hand figured at each fill up. I have now personally put close to 9k miles on my truck, so it has seen its share of full tanks to conclude the average. Today must have been a fluke or hte truck was in a really good mood. On the way to work this morning at mile 41 of my commute, I happend to look down and see my DIC showing....Well, if I say it you probably wouldn't believe it. So, the picture should say it all....

strike1st · April 24, 2014

Well...since there is another recall...I'll be letting my dealer take a look at the mileage issue early.

Hopefully Friday or early next week.

Newm · April 28, 2014

2nd fill up on the new truck....18.1 hand calculated with the DIC showing 18.8. This is about 80% or so highway mileage. Not to shabby for a big ole 6.2L.

patriot · April 28, 2014

Mine's about 20MPG mix of highway/city/mountains, and I'm not babying it. If I did, it'd be a bit higher.

5.3L

dodgehemi0 · April 29, 2014

Yup killed the 100,000 mile extended warranty in 20 months

What do you do to drive so many miles?

pendragon · April 29, 2014

What do you do to drive so many miles?

Bank servicing across Northwest BC, pretty big country up here

Crf450r420 · May 4, 2014

Driving my 6.2 like a grandma still didn't get the ratings others have shown here. I get my best rating at about 45 mph with almost 30 mpg. My DIC best of 25 mpg is when stuck on a very long 55 mph highway. My DIC does jump around a little bit, but has averaged out to .5 mpg above actual usages. I'm still getting about the same mpg as my old 1995 Nissan V6 pickup I've had the last 15 years, so I'm happy about that when it's mixed with all of the extra room, four doors, towing capacity, payload, 4WD, and comfort. I think if the trans would just shift gears it could get better mpg and be smoother, coming from only driving stick shifts I expect it to be positive and this frustrates a lot. Here is my records so far with a mix of trying to get the best mpg and some playing in the mountains.

Edited May 4, 2014 by Crf450r420

patriot · May 4, 2014

I average ~20MPG, city/mountains/highway combined. Not bad for a truck this size with a 5.3L engine.

My '02 w/4.8L averaged 16MPG on the same trips.

dodgehemi0 · May 5, 2014

I completed a 172 mile drive with my best gas mileage getting 23.2 on a 50 mile average. I average the whole trip at 20.4 and that is with the new 6.2 L in a crew cab 2014 Denali 4x4 doing 70 miles an hour down the interstate and in and around Nashville. That's better then my F150 eco-boost i had. Very happy so far. My lifetime average for 552 miles is 17.3. Not bad

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Edited May 5, 2014 by dodgehemi0