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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!usc!sdd.hp.com!elroy.jpl.nasa.gov!ames!kronos.arc.nasa.gov!chucko
- From: chucko@kronos.arc.nasa.gov (Chuck Fry)
- Subject: Re: Motor oil is motor oil... or is it?
- Message-ID: <1992Sep11.005129.2133@kronos.arc.nasa.gov>
- Sender: usenet@kronos.arc.nasa.gov (Will Edgington, wedgingt@ptolemy.arc.nasa.gov)
- Nntp-Posting-Host: mccarthy.arc.nasa.gov
- Organization: Recom Technologies, NASA Ames Research Center, Moffett Field, CA
- References: <1992Sep9.234902.6535@kronos.arc.nasa.gov> <nataraja.716161135@lead5>
- Distribution: na
- Date: Fri, 11 Sep 1992 00:51:29 GMT
- Lines: 20
-
- In article <nataraja.716161135@lead5> nataraja@rtsg.mot.com (Kumaravel Natarajan) writes:
- >QUESTION: Is it bad to go from one kind of oil (say crude to
- >Mobile 1) How about mixing the two? The back of the Mobile 1
- >bottle says it's "fully compatible with conventional oils".
- >Anyone know?
-
- It certainly doesn't hurt anything to go from dinosaur oil to
- synthetic. In fact most synthetic oil makers used to recommend
- waiting until the engine was broken in to start using synthetics,
- because the lubrication was so good the piston rings would never seat!
- I don't know what they're recommending now.
-
- Switching back to dinosaur oil after synthetic shouldn't hurt
- anything, but you obviously lose the advantages of the synthetic oil.
- And mixing them is OK according to most manufacturers, but the
- benefits are reduced proportionately. That is, you wind up with an
- oil that has most of dinosaur oil's properties and most of synthetic's
- expense.
-
- -- Chuck Fry Chucko@charon.arc.nasa.gov
-