My '92 Saturn SC had one of those "O" ring drain plugs. Never had a problem with it in the 130,000 plus miles we had it. I just put a coating of new oil on it (like the filter rings) and it never leaked or seized in all the time we had it. Really prefer the set up on the P5 and the Civic. They both use aluminum crush washers (same size on both cars) to seal the drain plugs on both the engine and transmission. And they're reversible if you happen to forget to have a new one on hand when you change oil. The salesman gave me a baker's dozen of them with I bought the car. The drain plugs are 17 mm hex heads.