Here is proper procedure according to the workshop manual. I know it looks easy and ask why am i even posting this but i know some people usually install the oil filer into the cap then install the cap. This causes the filter to twist with the cap which may or may not wear the top of the plug (not really sure but i guess that might happen). Instructions say to install the filter then install the cap with a new O-ring and lubricated. This may prevent this issue from happening?
THIS is what I was alluding to in my earlier post regarding DIYers (or anyone else not following the manual) oil changes; i.e. is there something procedural that the installer is doing that could be causing this rubber stopper to tear prematurely...
My dealership handles my oil changes and I will be printing out these diagrams for every future oil change, because as
@Dunrollin mentioned, the oil change jockeys are usually the lowest man on-the-totem-pole who is not necessarily a Ford-certified tech, let alone a Ford-certified diesel tech. I'll admit I would click the filter into the cup if I were to every attempt to do this =
anyone could make this mistake, so not passing judgement on anyone but just trying to figure out how this is happening.
Ford should update the F150 Owners Guide with the diagrams and procedure from the shop manual, as Ford has to expect that some percentage of owners will perform their own oil changes. Changing your oil is an American as "Built Ford Tough" = they should know better. I fear they may decline warranty claims (user error) to fix this once they ask who handles your oil changes. This is an example of why I went the ESP route, as Ford is the only one who wrenches on my vehicle, so they can't blame me for something like this.
Great collaborative effort by forum members here to get to the bottom of this long-standing issue. Many thanks to
@Kval and
@Dunrollin for photo-documenting everything = the owner-contributed technical content on these forums never ceases to amaze me!