Ram towing mileage

Pre Eagle head 5.7s just plain suck for mileage . I’ve had my 2003 since 04 and it gets 11-13 empty in town . Maybe 16-17 hwy @ 55-60 mph . Towed a 5000# travel trailer once and got about 7-8 ! My 74 Power Wagon with the 383 Magnum out of my 70 Charger would get mid teens driving nice and about 8-9 towing a racecar.

Difference being the Power Wagon would do 60 mph over the passes and the Ram would do 30 !