2015 GMC Yukon XL Denali MPG (6.2L, 8-speed)
We did our first road trip last weekend in our new 2015 GMC Yukon XL Denali with the 6.2L and the new 8-speed transmission. Towed my brother's boat to AZ, no trailer on the return trip. And I was real...
Forum Discussion
N-Trouble wrote:
Are these hand calculated values or off the dream-o-meter? What grade of fuel you have to run?
My first 2 tanks were 87 (before I read that 91 was recommended). Since then I've been running 91, and my butt-dyno says it runs a bit stronger on 91 - but who really knows. I think it's enough of a difference that I'm spending my own $$$ to buy 91 instead of 87. Putting my money where my mouth is there...
As far as hand-calculated vs. the DIC - my initial comments were from the DIC, but I have the gas station receipt and it's not hard to figure out...
I reset the DIC when I filled up on my way out of Arizona, and the DIC was showing 20.1 MPG for 301.0 miles when we got home Monday night.
The next morning on my way to work I got gas and it took 15.3 gallons. A quick Google Map search shows that gas station is 5.2 miles from my home, so 306.2 miles / 15.3 gallons = 20.03 MPG. Given that I was rushing on the way to work and driving pretty fast, I'm not surprise that my MPG dropped from 20.1 to 20.0 MPG.
So in this case the DIC was pretty accurate.
The DIC was always incorrect in my old Suburban, so I'll keep checking this one...
