can any one tell me fuel economy on pet 386
63" Engine Specs Cummins Engine Type ISX Horsepower 485 Transmission 13 Spd Check for Over Drive Yes Engine Brake Yes Suspension Pete Low Air Leaf Ratio 3.55 Tires 22.5 Wheels All Aluminum Wheelbase 235" Front Axle Lbs 12,000 Rear Axle Lbs 40,00
or
Cummins Engine Type ISX Horsepower 550 Transmission 13 Spd Check for Over Drive Yes Engine Brake Yes Suspension Pete Low Air Leaf Ratio 3.36 Tires 22.5LP Wheels All Aluminum Wheelbase 248" Number of Rear Axles Tandem Front Axle Lbs 12,000 Rear Axle Lbs 40,000
thanks