Me, again. The oil drain plug and gasket- are they one or two items, and should they be replaced at each or any oil change? I am a do it yourselfer- that way I know exactly what and when is in the crankcase- and the directions say to examine and replace these items if needed. My past experience with imports (BMW, Honda, Lexus, Nissan, as nauseum) all show a crushable drain plug gasket that should be replaced at each drain. Does same apply to my WK2 with 13100 miles- the oil was changed and lights rset by dealer a week ago, but I am also a belt and suspenders man- I want to put in Mobil 1 just to be sure, but do not want to mess up something that is not currently messed up, if you know what I mean. Oh, and there is more. What dimension is the drain plug, and do I have to remove any splash shields, ala Nissan, Lexus, et al? I am not lazy, just arthritis and repaired knees (too many years coaching Track and Field, Cross Country, weight lifting make crawling around on concrete on my back, well, less than rewarding- but I refuse to give in) and any knowledge gained sitting at my computer bugging the forum members is helpful- as opposed to crawling under the Jeep. Thanks for your collective patience while I undergo my learning curve.