Pretty decent highway mileage I must admit

[Vortex]

Just took my new 2020 Tahoe (5.3) on a first decent trip from DFW to San Antonio and back and was surprised at the fuel economy. Headed back north I took the Pickle Parkway which is maybe 125 miles of toll road where the speed limit is 85 mph and for the entire return run I averaged 25 mpg. That is pretty damn good considering no tailwind and I never really drove below 75 mph the whole 300 miles. That is better mileage than I remember my new VW Bug back in 1973! In the wish department I sure wish I could have found one with the 40/20/40 seats rather than the giant console but other than that quite pleased.

 

[hcvone]

That is good, my Escalade's would get 22-26, 22 going up the mountains, 26 coming down, with cylinder deactivation programmed to stay on longer, my 19' Callaway Tahoe has trouble getting 20 on the highway, but that's because the owner has problem keeping the pedal off the floor

 

[Larryjb]

THIS is interesting, considering the posted economy is 15/21. Also impressive considering that the sweet spot for fuel economy is around 60 mph without AFM.

I wonder how will 2021 do with DFM instead of AFM?

 

[swathdiver]

THIS is interesting, considering the posted economy is 15/21. Also impressive considering that the sweet spot for fuel economy is around 60 mph without AFM.

I wonder how will 2021 do with DFM instead of AFM?

These motors seem to get more efficient the faster we drive them to a point.

 

[K2 Kaiju]

These motors seem to get more efficient the faster we drive them to a point.

True, my dic says higher mpg when im going 80+, but I did lose some mpgs after chopping front lip + adding fogs & esky mirrors. Stock mpg is much better than I expected...

Sent from my SM-G975U using Tapatalk

 

[RB_Trucker]

My 4x4 Suburban saw a best of 26mpg going to phoenix AZ from Los Angeles. 85mph cruise control. I was a bit shocked. Coming back was 23mpg. I’m BB tuned and i think that made a huge difference.

 

[Pops McGee]

my 2016 Tahoe 4x4 easily gets 26+ cruising around 70 mph on relatively flat highways in NJ. My last trip to CT I avg 28.2. On 93 octane

 

[Doubeleive]

lol, I got it down to 8.3

 

[swathdiver]

No wonder all these K2s are flying past me at 85mph! LOL There is little incentive to drive slow as it is not appreciably saving them on fuel.

 

[Joseph Garcia]

Truly impressive mileage, for sure.

I 'might' get 18 mpg on the highway, if my wife is in the truck with me.

Otherwise, I'm 10-11 mpg in the city, and 15-16 on the highway. I should note, however, that I'm never trying to get good mileage, so I am part of the problem for sure.

 

[avalonandl]

Direct Inject really helps the mpg. Your efficiency is up at least 5%

 

[RB_Trucker]

This is my recent trip from LA so Sacramento and back again, this is the return trip. I got 23mpg average there and this 25.1 on the way back... 31.5gallon tank gave me a theoretical 638 mile range. Not bad for a 5600lb 4x4

View attachment 251354

 

[BG1988]

These motors seem to get more efficient the faster we drive them to a point.

yeah my 6.0 the sweet spot is 40-45mph

the BEST ever was 31.2MPG on the highway :O

I really do want to do some mods to boost it to 40-45MPG... from the 31mpg i was able to get.. stock. I think a boat tail would do the job but it looks soo tacky..

 

[swathdiver]

yeah my 6.0 the sweet spot is 40-45mph

the BEST ever was 31.2MPG on the highway :O

I really do want to do some mods to boost it to 40-45MPG... from the 31mpg i was able to get.. stock. I think a boat tail would do the job but it looks soo tacky..

What do you think of those fellas that add motor oil to their gas tank and get 30 MPG with their old 800s?

 

[Miami-Dade]

my 2016 Tahoe 4x4 easily gets 26+ cruising around 70 mph on relatively flat highways in NJ. My last trip to CT I avg 28.2. On 93 octane

I only run 87 octane [Mobil] and get between 24-26 if it is all 100% highway. At 87K miles do not want to change octane. I see K2's everywhere I go. Law enforcement seems to have more it its fleet.

 

[waltcmusic]

While not a Tahoe/Yukon, I was able to achieve up to 39.7 MPG max on highway with a 2018 Silverado V6 RWD regular cab. Can anyone beat me? More info can be found here:

https://www.gm-trucks.com/forums/to...to-los-angeles-ca2964-miles-driving-straight/