mikez71
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- Mar 9, 2023
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VERY interesting!My Yukon XL weighs about a 1,000 pounds more than yours and gets 12.6 MPG with 100% city driving and averages 15.6 mpg with 50/50 city/hwy driving. That's 1.3 to 2.2 gallons per hour running around town and such.
2010s seemed to have unique tuning and got better mileage than all the other years.
I just looked at a stock 2010 tune vs my 2012 and there are some differences!
The engine side has a few seemingly small changes, O2 rich/lean vs airflow and some stoichiometry settings...
For the transmission, there are MANY small differences! Shift patterns have some small tweaks, but it also has an extra map that says eco mode. I don't know if that map is even used, I have 4WD maps instead. The torque converter clutch apply/release maps, apply ramp and slip tables.. Shift times and inertia profiles.. many small differences..