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- Path: sparky!uunet!stanford.edu!rutgers!concert!theo!brooks
- From: brooks@mcnc.org (Ted Brooks)
- Newsgroups: rec.autos.tech
- Subject: Re: Dirty oil after change?
- Keywords: oil changes
- Message-ID: <1992Sep10.134937.1342@mcnc.org>
- Date: 10 Sep 92 13:49:37 GMT
- References: <2030054@otter.hpl.hp.com> <1992Sep7.173024.14772@informix.com> <146@bluehau.bubble.org>
- Sender: daemon@mcnc.org (David Daemon)
- Organization: MCNC Center for Microelectronics, RTP, NC
- Lines: 42
- Nntp-Posting-Host: alvin.mcnc.org
-
- In article <146@bluehau.bubble.org> hugo@bluehau.bubble.org (Hugo Bueno) writes:
- >sgm@otter.hpl.hp.com (Steve Methley) says:
- >]neilw@informix.com (Neil Williams) in <1992Sep7.173024.14772@informix.com>:
- >]
- >]> My SO recently had her oil changed at a local gas station. When I went
- >]> with her to pick up her car, I took a look at the dipstick.
- >]> I was very surprised to see that the oil still looked pretty dirty....
- >]> .. but I know that my oil looks clear and brand-new after a change...
- >]> ..for service not performed, or they didn't change the filter...
- >]
- >
- >As a counter-data point, and one which I venture to guess
- >is much closer to reality.....
- >
- >I've done countless oil changes on cars and I have YET to see
- >one that has clear oil after the change. This even includes
- >changing the filter and using engine flushes.
-
- To counter your counter-data :-) my experience is, it depends. In my cars,
- the oil & filter is changed every 3K miles. I have found that the first 1k
- or so after a change, it's hard to check the oil level because the the oil
- is almost too clear to see on the dipstick. I basically have to look at
- where the dipstick is wet vs. dry. At 3k, my oil is a nice medium brown -
- never black. Of course, the sludge buildup under the valve covers is
- negligible, so there's not much contamination of the new oil.
-
- On the other hand, I have changed oil for people whose engines were
- basically sludge warehouses. The oil will look dirty 10 minutes after you
- start the car - especially if they decide to "save money" by not buying a
- new filter. The sludge and/or leftover oil in the filter will dirty up
- the new oil in a heartbeat.
-
- Ted Brooks
- ______________________________________________________________________
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