Changed my oil and used the GC green for the first time. I am giddy with green glee. What spirit to show on this holiday. I amassed a stash of 25 quarts of the "Green". My new Nissan Titan was screaming for me to put it in. I had to give in. I cut the OEM Nissan filter apart to have a look. And, to my surprise, paper end caps. Shame on them. Glad I purchased Wix.