I got back today taking my trailer with a load to cabin. Only around 1200-1300lbs but still got 19-20 MPG... I'm fine with that. I pulled the pass at 70MPH. Only hit 199.5F (~93C) just as I hit the summit for AT temps. Rear diff peaked at around 137F (~58C). That would be unloaded mileage in my GX 460 
