Beware I just bought a Mobil 1 M1-403 from Autozone and the starter thread on the filter must be off cause after 1 hr. trying to screw this thing on I went to the store and bought a Pure 1 and it spun right on!! What a joke! I thought the Mobil 1's were a good filter.

 

stp is what i use no issues i think mobile one is more like fram

 

i believe mobile 1 has there filter made by Wix

 

A lot of members like the Fleetguard Stratopore filetrs, as they are recommended by Cummins, and I think they make them. They can be had at Genos Garage, on line or over the phone. They also sell the Flettguard fuel filters,
This is not an area to try and save a few bucks.