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- Path: sparky!uunet!ogicse!mintaka.lcs.mit.edu!ai-lab!oreo!pwu
- From: pwu@oreo.ai.mit.edu (Peng Wu)
- Newsgroups: rec.autos.tech
- Subject: Re: Pressurize Oil Before Starting ?
- Message-ID: <27223@life.ai.mit.edu>
- Date: 26 Aug 92 13:55:20 GMT
- Article-I.D.: life.27223
- References: <15200039@hpspdla.spd.HP.COM> <1992Aug25.131721.15149@dg-rtp.dg.com>
- Sender: news@ai.mit.edu
- Lines: 35
- In-reply-to: brownr@hydra.rtp.dg.com's message of 25 Aug 92 13:17:21 GMT
-
-
- In article <15200039@hpspdla.spd.HP.COM> brownr@hydra.rtp.dg.com (Tall Randy
- Brown) writes:
- In article <15200039@spd.HP.COM> paulw@hpspdla.spd.HP.COM (Paul Welch) writes:
- >
- >I have seen (many moons ago) information on a company that provides
- >"before you start it" oil pumps. Basically, you add an aux. oil
- >pump that runs off the battery, and you pressurize your lubrication
- >system before turning the key to start the engine. I have also
- >read that on a typical 500 mile trip, 98% of the engine wear occurs
- >in the first ten seconds.
-
- Richard (I know you're out there), how about adding this to the FAQ?
-
- They are call 'pre-oilers' or 'pre-lubers', you can buy them from Summit
- Racing, among other places, they have a model from LRI for $560, 1 yr
- warranty. Summit's phone is 216-798-9440. The system runs your oil
- pressure up to 55 psi if you desire, and then you start the car. Hocus-
- pocus, you have reduced your engine wear by 90-95% (first ten seconds
- after startup). So, add one to your engine and it should last 1-2 million
- miles (if the average engine lasts 100K miles today).
-
- I have never heard of anyone using one of these, or any magazine reviewing
- one of these to determine the improvement in engine life.
-
- Pre-oilers may not reduce all the startup engine wear. The oil film that goes
- between axles and bearings are created by rotation, not by the oil pump. It
- takes a few moments to build the film even if the oil is pre-pressured. If
- the engine is not left sitting for long, there is always some oil in the
- bearings at start up and that may be sufficient for the few senconds when the
- oil pressure is building up. In any case, 55psi is not sufficient to "float"
- axles in the bearings, which may take hundreds if not thousands psi at certain
- spots. Therefore, pre-pressure helps but not much in most cases. I think
- additives like slick50 may be more effective. Is there any mechanics major
- out there?
-