STELLAR Fuel Milage

I picked up our7 Tahoe LT (DMax) ("The Red Baron") on May 5 and on May 10 started a drive from South Carolina to Colorado. I've included screenshots below of MPG performance along the way. We are traveling with our Dog so we broke the trip up into four segments of approximately 500 miles each. Overall, the truck performed well; there was a definite loss of MPG in the higher speed limit States. The ride was smooth with no notice of cross winds. We are out here until September and then heading back to SC so will be curious to see the performance on teh way back. Enjoy,

Tuscaloosa, AL


Van, Tx


Tucumcari, NM


Colorado

Rumor has it that you will get slightly better fuel mileage in 2wd instead of auto 4wd

altona said:

Rumor has it that you will get slightly better fuel mileage in 2wd instead of auto 4wd

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Maybe 1 more mpg hwy. The difference is probably added resistance at the transfer case in a 4wd setup.

altona said:

Rumor has it that you will get slightly better fuel mileage in 2wd instead of auto 4wd

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that's good to know/makes sense. I've been keeping ours in 2WD.

Just finished a 1400 trip up the East coast. 32.1 average, including going only 4 miles in an hour and 10 minutes on I95. Best Range after fill up was showing 740 miles. Speeds were usually set at 67 max at 70. Best 50 mile average was 35.4 mpg. 4wd Denali loaded to the ceiling with cargo and an outdoor storage container on a hitch mounted carrier weighing 250 pounds of fuel and stuff. Yes, it sagged in the rear some.

I could possibly get that mileage but at 70 mph we‘d get run over. I avg about 27 at 80-85 and that’s just going with the flow on I 75….

Chiming in here with my mpg. I've put 3000 miles on my 2022 Diesel Tahoe RST. 27.6mpg total average according to the dash. This is way better than expected. I also had a 2022 5.3L gas Tahoe, and I averaged 17.6 mpg after about 4000 miles before I traded it in. I've driven both the same way - conservatively on mostly flat roads.

Is anyone hand calculating mileage or just going off the dash? If you’ve hand calculated does it come close to what the vehicle says?

booyaltz said:

Chiming in here with my mpg. I've put 3000 miles on my 2022 Diesel Tahoe RST. 27.6mpg total average according to the dash. This is way better than expected. I also had a 2022 5.3L gas Tahoe, and I averaged 17.6 mpg after about 4000 miles before I traded it in. I've driven both the same way - conservatively on mostly flat roads.

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Could you share a few words on how the driving experience compares between the 5.3 and 3.0?

Holy Roller said:

Could you share a few words on how the driving experience compares between the 5.3 and 3.0?

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The first thing I noticed was the sound difference. I liked the sound of the v8 more. But after a day I got used to the diesel and it doesn't bother me. The v8 seemed to have a little more power, but the amazing fuel economy of the diesel more than makes up for that. Sometimes the diesel seems to hunt for gears a little, and I don't remember the v8 doing that. I've also had 3 service trips on the diesel vs none on the v8. 1) replaced rear axle due to a leak (this was after only after a few hundred miles I think). 2) headlight sensor malfunction. 3) "service emission system" error. Taking it in to the dealer tomorrow for that. I'm hoping that these 3 issues will be the last problems I have for a long time. Amazing vehicle aside from the aforementioned issues. I get a lot of comments on the looks as well as some "hey you know that's a diesel pump?!" at the gas station. "Yes, it's a diesel."