Re: Milage on 250 SuperDuty with new Diesel ???
Once you factor in a curb weight of 7000lbs, a 350hp diesel engine with twin turbos, 12mpg doesn't sound too bad. I still don't think anything compares (durability wise) with the old 7.3L V8. After 5000miles, mileage will start to improve, as with any engine. Once the piston rings get seated properly you'll see an improvement.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!