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986tate has the good suggestion just to leave a stuck cap wrench on the oil filter cup, in anticipation of the next oil change.
At the time, I needed the cap wrench to service my three other Boxsters, but that cap wrench is carried by Lowe’s under the Craftsman label, about $20 each, so you could just consider it a permanent modification to a particular car’s oil filter cup.
The cup has a flange which must be in firm contact with the engine block or it will leak copiously. It requires a lot of torque to reach the point of contact, and once installed under kinetic friction, to reverse the rotation beginning with static friction. Recall from your physics class that static friction is always greater than kinetic friction.
My larger concern was that the cup was stuck on the engine, and required such a high effort to remove it, exerted against the car while you are underneath it : a great way to knock a car off jack stands.
Yes, the paper cartridge filters are easier to inspect for metal than are metal-can ones. Summit Racing has an oil filter cutter for about $40, a tool you’ll always need and never wear out.
So, why did Porsche engineer the engine block and oil filter cup to have so much interference ??
Mercedes engines of the same era used a similar system : the filter used is nearly indistinguishable from Porsche’s, but their plastic filter appliance never gets stuck…
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