Hey folks, Before someone jumps all over me, I did search! The patient: 1983 R100RT (with oil cooler in case anyone asks) I did an oil change last night. Everything was going good until I put the oil filter in. It's about 1/2" too short in total, and slightly smaller in diameter than the old one. Of course, grease and oil covered hands, I didn't take a picture of the two side by each. I ended up re-installing the old filter, since otherwise I would be bike-less for about a week. My first thought was that the dealer sold me the wrong filter. I did some checking, and BMW part 11 42 1 337 570 is the right filter. On the box it had 11 42 1 337 570 and on the filter it also had 11 42 1 337 570. Yet it doesn't fit.:huh Anyone else run into this problem?