I need advice. We operate a garage, did an oil change on a 2007 F150 with a 5.4L, with 70,000 km. A few days later, began to make noise. Owner took it to the dealer, the dealer told him it needed an upper engine rebuild, $6,000. A technician at the dealership said the oil filter came apart and caused the engine damage. Scored cam guides and cam shaft damage. Installed OEM recommended, Pennzoil 5w20, and Pennzoil PZ42, Purolator manufactured. No loss of oil, proper quantity of oil installed. Sent the filter to Purolator for testing, came back 100% within specifications, no missing parts, gaskets present intact. Any suggestions as to what would cause this damage?