Hello everyone. Im going to keep this short and sweet. I recently purchased a used 2004 f-350 fx4 crew cab and Ive never owned a diesel nevermind a powerstroke. I do have years of turning wrenchs and experience with turbos on gasoline engines. I just want to know what to look out for and what is must be maintained. I am aware of head studs and egr delete.. my truck had the delete done already. I am also aware of the 2nd fuel filter below the drivers cab. Im concerned about programming but I want better mpgs. is it ok to program with stock head bolts? my truck has 340,000Km. thanks ps is it important to use fuel conditioner if im using premium diesel?