the wifes 2016 1500 chevy crew cab 4wd 5.3 (355 hp/383 torque) 6L80e tranny 3.42 axle gets a good 2-2.5 mpg better than her old '06 same truck (295 hp/330 torque) only difference is the '06 had the 4L60e tranny and 3.73 gears.
The newer '16 5.3 has much better towing performance across the rpm range... especially in lower rpms.
I really don't care for the rumble sound out on the highway when the 5.3 goes into deactivation mode....but recon it is what it is.
Every truck I've owned the dic mpg was always lower than actual pencil figures....maybe because I only reset every 4th or 5th fill up and I'm all rural/highway with no city driving.
