Filter recommendations change as filters change. Like the Ecore change to AC Delco. Lately I am re-considering what I run. Mail order to give me more choices than the local store.
I've nearly walked over plastic body Wix plastic Duramax fuel filters due to air leaks on the WIF threads. Both FRAM and Wix are known for their oil filters taking out 5.9 Cummins engines - the Wix was known bad in the late 90's. Both brands stood behind their failed filters and made changes to them.
Regardless I prefer the Mobile 1 or the Wix oil filters. At 2500 miles Wix for the 6.5 is my choice due to availability. Wix is better than Carquest per the study as the wix has the silicone anti drain back valve and the carquest has Nitrile. Re-branded and made to others specs is sometimes worse than the Real McCoy. Napa has 2 grades of oil filters and the drain back valve material is one difference. The Nitrile hardens over time and in the link above it's debris is what was going through the ruined engine... (or at least in the past this is what was found along with filter material.)
So Silicone anti-drain back valve and coil spring are high on my list of good construction. The M1 filter makes a compromise on the spring... Synthetic media is now on my list and will influence future choices.
I've nearly walked over plastic body Wix plastic Duramax fuel filters due to air leaks on the WIF threads. Both FRAM and Wix are known for their oil filters taking out 5.9 Cummins engines - the Wix was known bad in the late 90's. Both brands stood behind their failed filters and made changes to them.
Regardless I prefer the Mobile 1 or the Wix oil filters. At 2500 miles Wix for the 6.5 is my choice due to availability. Wix is better than Carquest per the study as the wix has the silicone anti drain back valve and the carquest has Nitrile. Re-branded and made to others specs is sometimes worse than the Real McCoy. Napa has 2 grades of oil filters and the drain back valve material is one difference. The Nitrile hardens over time and in the link above it's debris is what was going through the ruined engine... (or at least in the past this is what was found along with filter material.)
So Silicone anti-drain back valve and coil spring are high on my list of good construction. The M1 filter makes a compromise on the spring... Synthetic media is now on my list and will influence future choices.
