here are the specs
2005 Kenworth
Model T800
Sleeper Size 72"
Sleeper Aerocab Aerodyne Sleeper
Engine Specs Caterpillar
Engine Type C15
Horsepower 475
Transmission 10 Spd
Suspension AG 400
Ratio 3.36
Tires 22.5
Wheelbase 230"
I have noticed a air leak between the turbos.
I usually drive around 70 on the interstaes,but lately I have dropped down to 60-65 and mpg improved to about 5.45 from 5.1
I am going to try the progressive shifting and see if i can get the air leak fixed.