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I prefer the original equipment style cartridge within plastic housing so to make the cartridge's opening for inspection less challenging than having to hacksaw a spin-on filter housing open to examine the filter for metal particles, shavings, or bits. Plus, I'd guess hacking a metal housed filter might complicate the exam and leave the inspector wondering the origin of the metal he might find within - "Did it come from the filter housing OR the engine's insides?"
FWIW, I inspect (with great anticipation) the OE-style filter (MAHLE) on a 2000 996 every time the oil and filter are replaced with new and fresh Mobil One. The Carrera just turned 75,500 miles, owner is the third one, IMSbearing and RMSeal are original and the sportscar runs six DE track-days a year in addition to dry and saltless-road regular exercise throughout the year. We feel this thoroughbred has passed the death point and will run for many more years to come.
Further, when the time comes for clutch number two, the owner will then replace the IMSbearing with the proven best one along with renewing the RMSeal.
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Carrots, Oats, Apples, Sugarcubes, and 93+ Octane
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