Explain to me what the vehicle is used for?
Does the truck idle alot?
Do you change the oil by the hour meter or by the mileage?
What brand oil do you use?
Hello I'm Chris a Ford Employee and Certified Engine/Transmission Specialist.
Thanks for asking your question. I am eager to get your vehicle back up and running correct, I am here to help you out for a small fee far less than a dealership and easier on the wallet, so if this information is of aid PLEASE PRESS ACCEPT and help me out financially by paying the small fee. Please reply if further discussion is needed.
Your not lucky or unfortunate. Every body has 6.0 failure injectors. Most failures are caused by incorrect brand oil and overextended oil change intervals or by to much idleing. There is not much else you can do since you are doing everything already correct. One other possible problem is the new fuel does not have very much lubricity. you may want to add a 1/2 qt of low weight motor oil or transmission fluid to each tank.
Ford Technician
Ford trained Tech. Trans, X-fer Case, Steering & Suspension & Brakes, Engine, Electrical