Do Psd Engines Get Better After A Certain Mile Range ....i.e. My 03 Has 61000 Miles On It Is The Milage Going To Stay The Same Or Should It Get Better Or Worse?

 

It should be leveled off by now. Mine with 96000 has leveled off at about 16.5 all around

 

I Can Maybe Get Mine To Go 12mpg On The Hwy Thats Why I Asked Any Hints?

 

I'd say you're at the low end of the spectrum. Is your rig stock? It should definetly be broke in by now.

 

It will help if you're specific about your Super Duty's specifications (4x4, srw/drw, auto,manual, super-cab/crew-cab, etc..), your driving style (in the boost alot, drive around w/boost below 10, etc..), percentage of time on highways and city streets, how fast do you drive on the highway, any mods done, percentage of time towing/hauling, do you use fuel additives, etc.