I picked up a Purolator oil filter for a 500 mi oci. I had replaced the cam, lifter and timing set in my Jeep CJ-7 so I was running a short oci with break in oil during camshaft break in. I felt it would be a waste to run a Fram ultra (what I normally use) for such a short run. Fyi I am also running a magnetic drain plug as well. I drained out the break in oil and swapped the Purolator filter for an ultra and some high zddp oil. I decided to cut open the Purolator and was VERY disappointed to find the filter media covered in the epoxy they glue the end caps with.