Mahle OC84 off of our '74 BMW 2002. Approx. 1K miles with M1 20w-50. Very well made filter. Dense media, even pleats, very thick base plate and the end plates, center tube and integral pressure relief valve are one piece of relatively thick steel. The PRV is unusual, mounted at the base plate end, you can just make out the spring and the flow ports in the center tube. Replaced with a German made Mann & Hummel.