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From: quint@caip.RUTGERS.EDU (Amqueue)
Newsgroups: net.auto.tech
Subject: Re: What motor oil should I use?
Message-ID: <468@caip.RUTGERS.EDU>
Date: Mon, 18-Nov-85 04:15:04 EST
Article-I.D.: caip.468
Posted: Mon Nov 18 04:15:04 1985
Date-Received: Thu, 21-Nov-85 07:42:02 EST
References: <561@ihwpt.UUCP> <622@bonnie.UUCP>
Reply-To: quint@caip.UUCP (Amqueue)
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 21

In article <622@bonnie.UUCP> saf@bonnie.UUCP (Steve Falco) writes:
>
>2) I have seen notices that GM no longer recommends 10W-40, they are
>   switching to 10W-30.  I don't know why.  I also doubt that 10W-40
>   will become unavailable.
>
>	Steve Falco

     As I understand it, 10W-30 is a lighter weight oil (less viscous?)
and gives less resistance to the motin of various parts of the engine, thus
increasing gas mileage. However, this also lubricates less well, and your
engine will wear more than if you were using 10W-40. This is how it was 
explained to me when I asked, with the added comment that the increase in
mileage was probably not worth the extra engine wear.

     I may be wrong; if I am, Im sure we will all find out!

helpfully
/amqueue
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