What's everyone getting towing with your hoe? 2004, 5.3, 113k miles, 3.73 with tow package, stock tire size and Airaid jr. I've only had it about a month now. Was getting 12.3-13.6 unloaded for mileage. Did an oil change, air filter, plugs, wires, and topped off fluid in the rear end. Mileage...