Real Life MPG 5.3 / 6.2

helli47 said:

I just recently switched from a '21 Yukon at4 5.3 to a '22 Yukon at4 6.2. Right away i noticed the 6.2 had a big increase in fuel mileage of 18 mpg on interstate going between 80-87 mph. I couldn't dream of ever getting that with the 5.3. Best i seen on the 5.3 was 16 mpg and that was best, usually 13-14 mpg. My opinion right away would be the 6.2 hands down.

Click to expand...

xycrazy said:

How's that even possible? Bigger engine less fuel consumption?! Did your road profile changed or your gas foot?

Click to expand...

helli47 said:

I just recently switched from a '21 Yukon at4 5.3 to a '22 Yukon at4 6.2. Right away i noticed the 6.2 had a big increase in fuel mileage of 18 mpg on interstate going between 80-87 mph. I couldn't dream of ever getting that with the 5.3. Best i seen on the 5.3 was 16 mpg and that was best, usually 13-14 mpg. My opinion right away would be the 6.2 hands down.

Click to expand...

xycrazy said:

What do you get? Isn't the tank of the current version 24 gal big?

Click to expand...

SSGUNNER said:

Im going to disagree as I can easily get pretty close to the 26 mark. Either my eyes deceit me or Im imagining things but I know what I get In my Rig. Yes I would need to drive like a grandma and on occasions I do relative coast when traveling but these numbers were obtained on flat grounds. Now city driving, no argument there which I do a lot of with constant red lights which result in my lower mpg. Just filled up with mid grade yesterday at $5.49 here in socal. Lets see what my avg is on my next run.

Click to expand...

Seamus said:

Yep. That is what stopped me in my tracks. I heard the new active fuel management was greatly improved, and totally different and could run on 2 cylinders. We test drove and loved it. The mileage going down was very surprising. I just figured the new sytem was improved it would be better mileage. Nope. We hesitated coming froma 2017 Yukon Denali which got really good mileage. That hestiation during Covid was right as the market went nuts. We wanted the 3.0 at that point which was impossible. When thing calm, we will try again, till then the Sierra Denali 3.0 will hold us over.

Click to expand...

kcb14214 said:

I have a 22 tahoe(work ride) with the 5.3l and I'm getting 12-14, but it idles a ton and has spurts of high performance.

Click to expand...

olyelr said:

And everyones mpg average is gonna vary from one person to the next. Lots of factors come into play…some always drive with a lead foot, others drive like an old grandma on sunday…some have winter gas, with cold starts and idle time to warm up…some use 4x4, some dont have 4x4…some travel flat highways and others through mountainous terrain…city to highway…

Theres just sooooo many variables. But, from my short experience with the newer platform, driving the same way we always have in the same terrain, they simply do not do as well on fuel as the last model year.

Click to expand...