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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!caen!uwm.edu!news.mr.med.ge.com!hinz
- From: hinz@picard.med.ge.com (David Hinz Mfg 4-6987)
- Subject: Re: Break-in period
- Message-ID: <1992Nov5.070214.24324@mr.med.ge.com>
- Sender: news@mr.med.ge.com
- Nntp-Posting-Host: blowfish
- Organization: GE Medical Systems, Magnetic Resonance
- X-Newsreader: TIN [version 1.1 PL6]
- References: <Bx7oLs.43G@news.cso.uiuc.edu>
- Date: Thu, 5 Nov 92 07:02:14 GMT
- Lines: 31
-
- Mark Wayne Blunier (mwbg9715@uxa.cso.uiuc.edu) wrote:
- : dan@larry.sal.wisc.edu (Dan Roehre) writes:
- :
- : No it is not. When the eninge is rebuilt a can of 'special oil' is needed.
- : This helps the engine break in properly. A new engine has it added.
- : The warrany that GM gives with its Goodwrench engines is voided if you
- : don't add the special oil. My experience with breaking in engines seems
- : to be that the original oil should be used to at least what is recomended
- : by the manufacturers (of a new engine). Use regular oil for breakin, but
- : can use synthetic afterwords if desired. Engines that do not have the
- : break in oil in long enought do no get the rings to seat as well.
- : Mark B.
-
- I thought there was no such thing as "special oil for breakin". As I
- understand it, it just regular oil, but you have all your metal shards
- and assembly goop floating around in it. What I've done when rebuilding
- engines is to buy the cheapest junk oil I can & run the engine with that
- for about 5 miles, then change the oil (& filter) to decent (Castrol)
- with a real filter, and run that for a couple of hundred, then I switch
- to Mobil 1 at about 1500 miles.
-
- The first oil takes out the major junk, the second change takes out most
- of the rest, and from then on it's just normal break-in. Be gentle for
- at LEAST 1000 miles, preferably 2000. (not easy if you just spent
- big bucks on performance parts, you wanna TRY IT!)
-
- --
-
- Dave Hinz - Opinions expressed are mine, not my employer's. Obviously.
- Don't blame me; I voted for Perot! hinzd@picard.med.ge.com
- SAAB - Because you get what you pay for. Pherrets are Phun!!!
-