06 Ranger Sudden Fuel Consumption
06, 3L, auto, LB, 2X4, 32KK, 20.3Gal, reg gas, 60MPH top speed highway(mostly cruise), smooth acceleration, basically babied.
I've suddenly gone from 28miles/gal highway, to 16. I know a guy with a F350 who gets better. Engine seems to run good as usual, no lopping or hesitation, fast starts cold, accelerator response good, tires are inflated, rotors seem to be loose enuff. No dash or "engine" lights popping up.
Nothings been done to it yet except cabin filter,reg oil(synthetic) changes and filter every 5000 miles, and air filter.
It does 63KM(41+-M) highway on 1/8 tank.!!!
Plugs seem early to change, as well as PCV valve, maybe I could replace reg plugs with platinums. Do these engines need valve adjustments at 32K? Timing checked?.
Wouldn't such a drastic change cause the computer to indicate somethings wrong, as that would affect exhaust chemistry.? Should I get a diagnostic run on it?
Any help would be appreciated.