2006 SLT Club Cab 4x4 4.7L 5-speed Auto

Gas Mileage

MPG
15.85081585
16.70749633
15.13250406
13.91127863
13.47084824

Average: 15.01458862
@ Total mileage 1443

Strange, the owner's manual said it would get a little better as I put more miles on it...its getting worse.
I drive with a medium foot