Have a 2008 F250 CC 4x4 5.4. Anyone heard of cam phasors going bad @ 75,000 miles......tech says oil not changed frequently.....I had the records from the first owner and looks like he was religiously in for service every 3k... i have owned the truck for 1 year and have changed the oil every 3k myself. looks like engine will need extensive work which i would rather replace..... no contact to manufacturer but i will.....