Originally Posted by dan50
I mean unapproved by the filter manufacturer. So, if Purolator says an P10241 is the filter for the 2012 Focus but you decide, like the OP, to use a different Purolator because you think it fits/filters "better", it's conceivable you could have a problem. I agree if you use the filter Purolator specifies for the car there shouldn't be an issue.
Purolator makes a filter exactly the same as the P10241 except for the length. If you have the clearance it is common for 2 filters to be exactly the same except for the physical length. There is plenty of room in the 2012 FoFo for a longer filter. If you use a longer filter you benefit from it having a higher surface area as well as being able to hold more oil.