Poor mpg

Clint623 · June 15, 2017

Sent from my iPhone using Tapatalk

Knotsure · June 15, 2017

The 21 miles per gallon was in the hill country. I guess my truck really likes Central Texas

Sent from my iPhone using Tapatalk

I have mine set to the last 400 miles (17.9 high). My truck got over 21 as a high in The last 50 miles.

2014 Silverado Z71

Edited June 15, 2017 by Knotsure

Dnt · June 15, 2017

Yeah the short distances really mean very little. Got to get a few tanks run through to get a good average. I do a lot of city driving stop and go and still kind of getting broken in so should get better. Next long highway run I will reset the trip meter and see if I can get around 30mpg I mean heck it is just a 6000lb behemoth shaped like a brick in the front it should get excellent mpg??? right?

Edited June 15, 2017 by MyFavTruck

CadillacLuke24 · June 15, 2017

I regularly get around 20 on the interstate (80 mph limit in WY), 22-23 on the state highways (70 here in WY), and my maximum is 26.2 at 55 mph. That was on a state highway when I was stretching the bit of gas I had left in my tank.

Granted I use 91 octane, nearly all of that being E0 DinoCare gas, though I get decent mileage with E10 from Loaf 'N Jug. Still, not bad for a 6.2L V8

Justin101714 · June 15, 2017

2016 Silverado 5.3

2 RC Level Kit

Running factory 20's

Non-ethanol Regular 87

Sent from my iPhone using Tapatalk

Edited June 15, 2017 by Justin101714

michigan2500hd · June 15, 2017

I drive 40 miles one way to work in central texas, the hill country. If I use cruise every chance I get at 2-4 miles over the speed limit I am around 16+ mpg. That is with stop lights and hills and a little highway driving. When on the open highway I can get 18-20+ if I don't drive to fast.

These guys getting 20,22,24+ mpg must be cruising mostly at 40-60 mph on flat roads. Or 60-70 on good flat highway with NO lights.

2014 Silverado Z71

I rarely drive on the expressway, even I do v is only a few exits between on and off. I have the Bilstein leveling shocks and a hybrid mud/ all terrain tire that's 33.1" tall on 20" wheels.

I don't hot rod often but every once in awhile I like to feel the 6.2 power. The OP's millage sounds low for a 5.3 because my DIC rarely dips below 16.6 and usually is 18.6 - 20.8 ish. Of course that is the computer figuring the mpg as I havn't done a hand calc yet.

Sent from my E6810 using Tapatalk

Knotsure · June 15, 2017

I checked my best mpg this morning.

Last 400 miles 17.9

Last 50 miles 22.7

Last 25 miles 24.9

I run LT falken wildpeaks and a front bilstein lvl.

2014 Silverado Z71

Edited June 15, 2017 by Knotsure

njk4o5 · June 15, 2017

what ever happened to the good old hand calcs? the DIC isn't always accurate. mine constantly says my max mpg was 25mpg. it was probably when I was going down a big hill with a tailwind. when I hand calc each tank I consistently get 17-18mpg. my DIC tells me 19-20 mpg average so its 1-2 mpg off always

aseibel · June 15, 2017

what ever happened to the good old hand calcs? the DIC isn't always accurate. mine constantly says my max mpg was 25mpg. it was probably when I was going down a big hill with a tailwind. when I hand calc each tank I consistently get 17-18mpg. my DIC tells me 19-20 mpg average so its 1-2 mpg off always

Are you resetting your "trip" when you get gas? I always do and compare it to hand calc. My numbers are always within 1 mpg at the most. Yes, the DIC always guesses high, but its pretty close for me.

Of course your all time best MPG was under ideal conditions. if you don't like being reminded of that one day, then just reset it.

Aboogie808 · June 15, 2017

It depends on the road conditions. I notice when going in mountains vs flat lands, I get different readings. I am running 6.5 lift with Toyo MT 33x12.5x20, Airaid Jr and K&N air filter with airbox mod. Highways I set cruise control at 65, avg is between 17.5 to 18.1 mpg. Locals is 15.5 to 16 mpg. I am not heaving on the gas or brakes.

OldBlue61 · June 15, 2017

what ever happened to the good old hand calcs? the DIC isn't always accurate. mine constantly says my max mpg was 25mpg. it was probably when I was going down a big hill with a tailwind. when I hand calc each tank I consistently get 17-18mpg. my DIC tells me 19-20 mpg average so its 1-2 mpg off always

That's what I do w/ mine. The DIC is usually 1-2mpg off from what I actually get. Usually, but not this last time. My last tank full was 21.6 vs. the DIC telling me I got 26.2. DIC is always optimistic.

Edited June 15, 2017 by OldBlue61

Clint623 · June 15, 2017

My truck decided to get off "stupid" mode today. Pic was taken on a flat stretch of hwy. that Southwind must be kicking today

Sent from my iPhone using Tapatalk

Beast1313 · July 25, 2022

I have a 2017 Silverado 1500 ltz with 5” lift kit and 33” tires and a k&n cold air intake plus cat back magnaflow exhaust..!
I am averaging 12.7 mpg..??!
Is that accurate?
Or do I have to get it turned??

please help with a reply??

thank you

CamGTP · July 25, 2022

If the 33's are LT tires and like a mud style tire, I could see that.

Getting it tuned won't do you much, 33's are still a factory size tire on these trucks and you'd only really be correcting your speedo and minor shift points. But a tune still isn't a bad thing, they make the trucks drive a lot better.

The 5in lift is killing fuel mileage and if you drive over 65-70mph, it only gets worse. A good "avg" on a truck that is stock that does 50/50 highway/city it probably going to be in that 17-18mpg range.