Best mpg so far

[Steebu]

Coming back from mt st Helen’s … prob should submit a feature request to go more than two digits, lol.

OK, full disclosure: 23 Yukon Denali Duramax, going down the mountain.

 

[CTown Duramax]

I got 35mpg with the cruise control pegged at 65mph going from Boston to Albany over the Berkshires on I-90.

 

[pa31p]

Pretty damn good!

 

[jmzvet]

Just completed 850mi round trip in my 23 Denali Duramax. Started at sea level and drove 425 miles ending at 7500 ft elevation. 25 mpg.
Got 31 mpg on the trip home.
Avg 67 mph.
Pretty amazing for a loaded down full frame SUV

 

[StephenPT]

I guess we'll turn this into a "post your best MPG in the 3.0 Duramax thread" -

Here's mine - this is the final leg of our road trip to SLO California almost a year ago. On the way back home after a rest stop, 150 miles of driving on I-5. Some traffic, but mostly at 60mph. Had it up to 38.0, but lost a few tenths with the traffic lights on HWY30 just before getting home. Loaded with a family of 7, clothes, some food, etc.