Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 (Tek) 9/26/83; site orca.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!mcnc!decvax!tektronix!orca!graham From: graham@orca.UUCP (Graham Bromley) Newsgroups: net.auto Subject: Mobil 1 oil Message-ID: <1221@orca.UUCP> Date: Fri, 7-Dec-84 15:47:34 EST Article-I.D.: orca.1221 Posted: Fri Dec 7 15:47:34 1984 Date-Received: Sun, 9-Dec-84 06:39:20 EST Organization: Tektronix, Wilsonville OR Lines: 17 I'm a bit puzzled by all the discussion about use of Mobil 1 synthetic oil (5W-30) in cases where the owner's manual requires 10W-30 or 10W-40, as they usually do. Surely the best thing is to simply use a good quality oil of the recommended weight and change oil and filter as specified, or more frequently if you really want to. Why risk voiding your manufacturer's warranty? No magic oil will prevent your engine from gradually wearing out. (The body will probably rust out first anyway). As for Mobil 1 lasting 25000 mi between changes, don't you believe it. The oil molecules themselves might, but long before then the oil will be polluted with minute metal particles from engine wear and combustion blow by etc., especially if the engine is new or rebuilt. If you are are really concerned about engine life, just do as the manual says. Oil and filter every 7500 mi seems to be the norm (for Japanese cars at least).