2014+ Gas Mileage (MPG) Topic

[Mark L]

Question for those with the Denali gauge cluster......

 

Since ours is a digital gas gauge, are you finding the low fuel warning is coming on prematurely?

 

As shown in my post above, I averaged 20.8 MPG coming back from San Diego and the low fuel light came on when I was approximately 10 miles from my house.

 

I searched through the Denali manual, but didn't see anything stating how much fuel is left when the low fuel warning light comes on. I heard someone mention 2 gallons, which at my MPG level, would mean I had nearly 42 miles of range left. When the light first came on, it did state a range of 56 miles, then gradually went down, until it just stated fuel range "low".

 

How it went from 42 mile range to low is beyond me. What is low supposed to mean? 5 miles? 10 miles?

 

So here I am coasting to my driveway thinking I could run out of gas at any second and long story short, I put gas the next day and it only takes 23.XX gallons

 

So that tells me I had 2 gallons and change in my tank. Here I was thinking I would run out.

 

The reason this is such a big deal to me is because I will be making this roundtrip to San Diego quite often in the near future and it is exactly 458 miles door to door for me (and I HATE HATE HATE to stop on road trips, literally will not stop if I'm by myself). Simple math tells us a 26 gallon tank @ at least 20 MPG (which I averaged to and from) should net me a range of 520 miles. Yet as shown above, my trip meter read 465 miles on the return trip with the low fuel level warning triggering and the range stating just "LOW".

 

So am I to believe I still had a range of 55 miles even when the fuel range stated low? Based on the exact math, that's what the range should have been.

Edited July 7, 2014 by Mark L

[2happyhicks]

Question for those with the Denali gauge cluster......

 

Since ours is a digital gas gauge, are you finding the low fuel warning is coming on prematurely?

 

As shown in my post above, I averaged 20.8 MPG coming back from San Diego and the low fuel light came on when I was approximately 10 miles from my house.

 

I searched through the Denali manual, but didn't see anything stating how much fuel is left when the low fuel warning light comes on. I heard someone mention 2 gallons, which at my MPG level, would mean I had nearly 42 miles of range left. When the light first came on, it did state a range of 56 miles, then gradually went down, until it just stated fuel range "low".

 

How it went from 42 mile range to low is beyond me. What is low supposed to mean? 5 miles? 10 miles?

 

So here I am coasting to my driveway thinking I could run out of gas at any second and long story short, I put gas the next day and it only takes 23.XX gallons

 

So that tells me I had 2 gallons and change in my tank. Here I was thinking I would run out.

 

 

 

The reason this is such a big deal to me is because I will be making this roundtrip to San Diego quite often in the near future and it is exactly 458 miles door to door for me (and I HATE HATE HATE to stop on road trips, literally will not stop if I'm by myself). Simple math tells us a 26 gallon tank @ at least 20 MPG (which I averaged to and from) should net me a range of 520 miles. Yet as shown above, my trip meter read 465 miles on the return trip with the low fuel level warning triggering and the range stating just "LOW".

 

So am I to believe I still had a range of 55 miles even when the fuel range stated low? Based on the exact math, that's what the range should have been.

I beleive you have 3Gal left when the Low light comes on. Think it starts somewhere around 60ish miles and gows to Fuel Range Low at 20ish....maybe your getting too good of mileage and the truck in cunfused...LOL...Ive havent gotten that good of fuel economy since before i got the updates... Now I do good to Average 17MPG... and i have 3.08s...

[Mark L]

I beleive you have 3Gal left when the Low light comes on. Think it starts somewhere around 60ish miles and gows to Fuel Range Low at 20ish....maybe your getting too good of mileage and the truck in cunfused...LOL...Ive havent gotten that good of fuel economy since before i got the updates... Now I do good to Average 17MPG... and i have 3.08s...

 

 

Thanks for the reply.

 

If I could be confident I can get 500 miles out of a tank, I'd rest easier.

 

It just seems the low fuel warning light is coming on too soon.

 

Time will tell.

[patriot]

Mine came on with 65 miles left on the tank.

[NoProblem]

I personally would like to know what the highway economy is like, I do about a 1000 miles a week almost all highway

I have a 2014 Silverado 1500 Z71 Crew Cab (6.5' box) 5.3 V8 with 3.08 rear end, 18" wheels. Also installed a Bak roll up tonneau cover.

 

It had 1900 miles on it when I started - I just took a MI to TX and back 3650 mile trip and averaged 19.2 mpg for those miles. Pretty much kept it right near 80 mph most of the time. I stopped off at a local gravel truck scale before the trip - full tank of gas and one passenger, the truck weighed in at 6040 lbs.

 

Awesomely smooth and quiet ride - and very easy to get 400 miles out of a full tank on the highway!

Edited July 9, 2014 by NoProblem

[SnowGoAK]

Looks like I may have an issue...

 

 

 

Mostly city, but some highway mixed in. I fill with 87 and have been easy on the throttle.

[fondupot]

 

 

How it went from 42 mile range to low is beyond me. What is low supposed to mean? 5 miles? 10 miles?

 

 

 

When it the range gets below 40 miles, it changes to LOW.

[Johnnyee]

I just took a 2,600 mile trip from Houston to Seattle towing a 6,500 lb travel trailer. My 6.2 / Max Tow silverado averaged 11.2 mpg @ 60 mph. I'll post the return leg later.

 

 

Sent from my iPhone 5s using Tapatalk

[Mark L]

 

 

When it the range gets below 40 miles, it changes to LOW.

 

Oh ok, I kinda figured that, I just wish it'd be more precise, like 30-20-10

 

LOW could mean any of those

 

 

I just took a 2,600 mile trip from Houston to Seattle towing a 6,500 lb travel trailer. My 6.2 / Max Tow silverado averaged 11.2 mpg @ 60 mph. I'll post the return leg later.

 

 

Sent from my iPhone 5s using Tapatalk

 

 

Damn, I've never towed before, but man is that a low MPG number. That trip had to cost around $800 in fuel

[fondupot]

 

Oh ok, I kinda figured that, I just wish it'd be more precise, like 30-20-10

 

LOW could mean any of those

 

Well it's designed as an idiot light so people don't run the tanks dry. You can really damage a direct injection motor by running out of gas.

 

 

Sent from my iPhone.

Edited July 15, 2014 by fondupot

[NoProblem]

Looks like I may have an issue...

 

IMG_1803-1.jpg

 

IMG_1804.jpg

 

Mostly city, but some highway mixed in. I fill with 87 and have been easy on the throttle.

 

Seems like you should get better milage then that. I fill up with regular gas and live in the country so my city driving is very little and I am not *that* easy on the throttle. There are no hills around here either, flat like a pancake everywhere here.

 

[bigsapper]

Looks like I may have an issue...

 

IMG_1803-1.jpg

 

IMG_1804.jpg

 

Mostly city, but some highway mixed in. I fill with 87 and have been easy on the throttle.

 

Do you suspect you're truck is getting crappy mileage? Or that your instrumentation is screwed up?

 

Have you measured your mileage the old fashion way? Fill up/zero your trip meter, run to near empty, fill up, divide trip meter mileage by gallons to fill up?

[SnowGoAK]

 

Do you suspect you're truck is getting crappy mileage? Or that your instrumentation is screwed up?

 

Have you measured your mileage the old fashion way? Fill up/zero your trip meter, run to near empty, fill up, divide trip meter mileage by gallons to fill up?

 

I haven't measured the old fashioned way yet. If the instrumentation is correct and 12.3MPG is my actual all time MPG, then the truck is getting crappy mileage. My 2007 would do better than that in 4WD after a snowstorm...

[Moldman]

I have averaged 19.5 for the first 2 tanks on mine under normal rural driving.

It's not really that flat in my area.

[Newm]

Not sure if I just got a good batch of gas or what but I just got my best "normal week" tanks to date.

405 miles

21.23 gallons

19.08 MPG.....man I love this motor!