Pretty decent highway mileage I must admit

[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/