Hey McDuff,
Lets see, the element of an oil filter is made out of paper, if the end pieces are cardboard, what does it matter as long as they remain well attached to the filtering element ? The Mahle elements for the V70 have 'cardboard' endpieces (they feel kind of fuzzy) and seem to work just fine. I got over 400,000 miles flogging the guts out of a Chevy 2.8L V6 mostly using Fram filters and Valvoline 10W40.
Right now the 240 is getting Mann filters and Rotella 15W40. I'm sure the motor will last longer than the body. For air filters I like one with lots of pleats and well glued to the gasket. I change them when they fill up with dandelion fuzz or dirt, which ever comes first.
If you are still looking for a PH8-A replacement, look for old Ford I6 or V8 long filters, take your pick of brands. The NAPA Gold line is better than their Silver series. They seem to have an anti drainback valve in the filter. The lifters in the 300 cid 6 in my '91 F150 rattle less with the more expensive filter.
Greg
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