One application for the Fram PF25 is the AMC 258 Inline 6 (4.2L). I am sure there are others as well.
pf25 (which is an exact fit to the pf35, except is a little shorter) cross references to FL-10
This Oil Filter Interchanges with: Pennzoil PZ3, Pennzoil PZ52, PCM R077002, Volvo Penta 835440-9, Napa 1069, WIX 51069, Fram CPH 30, WIX 51069, Fram CPH 30, Fram PH30, AC Delco PF25, Penske PN30, Purolator L20049, Castrol CM30, Motorcraft FL10, and Quaker State QS30 There are many alternates that you can finid by doing a cross ref on any of the above.
The following replace the AC PF-25. The Fram PH-13 is a long version of PH30 which should also fit. For those mounting the filter upside down or sideways there is a newer version with an anti-drainback valve PH-6606. Fram PH-13 Wix - 51086 Napa Gold - FIL1069 Penzoil- P Z3 AC- PF25 Purolator-L20049
Many early GM vehicles
Chevy 350's mostly.
Try a PF454 ac delco PF35 also known as PF1218 its the longer oil filter if anybody wants to know 1991-1993 Chevrolet Caprice 9C1 with oil cooler lines. The PF454 is the smallest I've seen, with the PF25 and PF35(PF1218) the next steps up. Of course there is the massive 2-quart capacity PF932 if you don't have any clearance problems.