Real Life MPG 5.3 / 6.2

[Joeltz]

2015 Ltz - Texas speed DOD removal kit & Dyno tune 70mph 17-19 , 65 mph 19-21,
60 mph 22-23 , 55 mph 23-26
Aero/ wind drag is factor !

 

[Micahsd]

Here’s the best I’ve been able to achieve in over a year on 87 octane with 10% ethanol (if it has didn’t have ethanol then it would’ve been higher).

What’s interesting is on the other screen not shown after filling up it thought the max mileage is 520 miles. Some of this driving is a mix of 61 mph and 75 mph. Obviously the mpg went down when going 75 mph.

 

[LordWayback]

2001 GMC Yukon XL k1500 5.3 Loaded with the normal junk in my trunk (accounts for 2 People) 13.5 mpg combined 265 60 r18 tires nearly all freeway (with bigger diameter tires or different gearing I could probably break 18 mpg)
(I drive like 10 miles in the city a week rest freeway besides specific circumstances) cruise control 68 ish with bad spark plugs, good intake filter (oem spec) no exhaust or engine modifications, worn fuel system 162k? Miles going hard merging on the freeway and a few good hills, if you chill on the merging and passing you can probably hit 14mpg combined with (mostly) freeway. I’m on “highway” tires but they suck for mileage.

 

[MrMonte]

Been 2K miles since I turned off AFM on my 2018 Yukon Denali Ultimate with 6.2L 10 speed & factory 22" rims. With a fare about of spirited driving, some 120mph+ runs & many hours of rush hour traffic my overall average is 21mpg for the last 2,000 miles.

 

[Tahoered]

2022 RST 6.2. I am a cruiser and drive conservatively.

 

[SpyShops212]

I get 28 mpg when driving from Texas to California in my 2018 Escalade with 45k miles. The best I seen was 36 mpg for a 25 mile average.

 

[vcode]

I get 28 mpg when driving from Texas to California in my 2018 Escalade with 45k miles. The best I seen was 36 mpg for a 25 mile average.

Downhill with a tailwind @ 45mph? Or is your dash set to kilometers?

 

[tom3]

We live in a small town so there's not a lot of city driving here. Use mid grade gas always. Usually see about 22 mpg on trips really loaded up, a bit under 20 with routine daily driving. 2019 4x4 Tahoe with the 5.3 gas non-flex gas engine. Just went out and took a pic of the readout.

 

[RST Dana]

At the risk of being repetitive, I repeat, vehicle display “may not” be the same as the actual calculations done via the manual method. My 17 always reads a bit higher and the tires/gears are stock configuration.
So real life should be actual manual calculations.

 

[WalleyeMikeIII]

At the risk of being repetitive, I repeat, vehicle display “may not” be the same as the actual calculations done via the manual method. My 17 always reads a bit higher and the tires/gears are stock configuration.
So real life should be actual manual calculations.

See Post #120, we had the whole Sharp vs. Casio vs. HP vs. Onboard Computer discussion...I tihnk for 2021+ it is proving to be pretty darn accurate.

 

[RST Dana]

See Post #120, we had the whole Sharp vs. Casio vs. HP vs. Onboard Computer discussion...I tihnk for 2021+ it is proving to be pretty darn accurate

The recent posts I’m referring to are NOT 21+, this the reason for my recent post. Additionally, not everyone reads ALL previous posts.

 

[tom3]

At the risk of being repetitive, I repeat, vehicle display “may not” be the same as the actual calculations done via the manual method. My 17 always reads a bit higher and the tires/gears are stock configuration.
So real life should be actual manual calculations.

Checked my mileage a couple times and it agrees with the readout down to a couple tenths. Readout miles agrees with my GPS also. And sitting in an interstate traffic jam the readout mileage does go down while idling. Really kind of surprises me how much difference there is in MPG for the exact same powertrains.

 

[vcode]

Checked my mileage a couple times and it agrees with the readout down to a couple tenths. Readout miles agrees with my GPS also. And sitting in an interstate traffic jam the readout mileage does go down while idling. Really kind of surprises me how much difference there is in MPG for the exact same powertrains.

I don't think there really is much difference between identical powertrains. What you are seeing is people posting under ideal conditions. There is no way a 2018 Escalade gets the same mpg as a 4 cylinder Camry. True mpg needs to be a decent round trip on the same route on the same day. I can get 27 mpg on a perfectly level road @ 45mph, but who drives in conditions like that?

 

[WalleyeMikeIII]

The recent posts I’m referring to are NOT 21+, this the reason for my recent post. Additionally, not everyone reads ALL previous posts.

Well, why would anyone w/ a 2020- be posting in info from their model this forum...

Powertrain is different, weight is different, aerodynamics are different...etc.

OP's question was to try and make a decisoin/undestand the difference in MPG in a 2021+ w/ a 5.3 vs a 6.2.

 

[Matz]

I get 28 mpg when driving from Texas to California in my 2018 Escalade with 45k miles. The best I seen was 36 mpg for a 25 mile average.

This is what I get with my DMax.

 

[tom3]

The recent posts I’m referring to are NOT 21+, this the reason for my recent post. Additionally, not everyone reads ALL previous posts.

Oops. I didn't read the previous posts or even noticed the forum is for the now generation machines. As stated, previous model results are not relevant to the new models.

 

[RST Dana]

Well, why would anyone w/ a 2020- be posting in info from their model this forum...

Powertrain is different, weight is different, aerodynamics are different...etc.

OP's question was to try and make a decisoin/undestand the difference in MPG in a 2021+ w/ a 5.3 vs a 6.2.

Since the OP didn’t specifically say 21+ (I know it’s rooted in that forum section) people have chimed in about non 21+ models.

 

[R32driver]

Bringing this thread back from the dead. Our '21 yukon xl (5.3 4wd on stock size ridge grappler tires) is now at 22,500 miles and the lifetime MPG is dead on at 17.5 just like it's been basically since new. I did a 235 mile trip today and came back with 20.2 mpg according to the dash readout but between how I drive and how my wife drives it looks like 17.5 is the true mpg

 

[vcode]

Bringing this thread back from the dead. Our '21 yukon xl (5.3 4wd on stock size ridge grappler tires) is now at 22,500 miles and the lifetime MPG is dead on at 17.5 just like it's been basically since new. I did a 235 mile trip today and came back with 20.2 mpg according to the dash readout but between how I drive and how my wife drives it looks like 17.5 is the true mpg

That is almost spot on with the EPA number....

 

[18Denali]

2023 6.2L Tahoe Z71 - averaging 12mpg with vast majority city driving (estimated 16mph average lifetime) after 1,000 miles of driving.
2018 6.2L Yukon XL - averaging 16mpg with slightly more highway but mostly city (estimated 20mph average lifetime) after 50k miles of driving.

The new car is definitely lower than I was expecting but mix of slower average speed, heavier tires, less aerodynamic, etc. factoring in here. Still love the new car but wish this was a couple points higher. All values from the onboard computer, going to start validating with paper and pen over the next few fill-ups.