Fram Force, Supertech, and ACDelco filters are all near-identical filters made by Champ Labs. Telltale design identification is the black nylon core. The higher end Supertech MP- filters get an indigo-colored silicone anti-drainback valve, the other standard Champ Labs filters get a black nitrile ADBV.Who makes supertech’s filters? I use them on my zero turn’s Kawasaki from a sale I scored a few years back. I believe I paid $1.50 a filter. Knew nothing about them other than the price was great for a once a year OCI (about 40-45 hours a year).
Champ Labs also makes an XL series of filters that get an orange silicone ADBV.
I believe all Champ Labs filters are 99%@30 micron efficiency, but the Champ XL's may vary.