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Posting-Version: version B 2.10.1 6/24/83; site watdaisy.UUCP
Path: utzoo!watmath!watdaisy!gvcormack
From: gvcormack@watdaisy.UUCP (Gordon V. Cormack)
Newsgroups: net.auto
Subject: Re: Oily Question
Message-ID: <6704@watdaisy.UUCP>
Date: Thu, 4-Oct-84 19:32:25 EDT
Article-I.D.: watdaisy.6704
Posted: Thu Oct  4 19:32:25 1984
Date-Received: Fri, 5-Oct-84 04:44:15 EDT
References: <147@petfe.UUCP>
Organization: U of Waterloo, Ontario
Lines: 15

The W in 10W-30 stans for "winter"; they run 2 viscosity tests:
the 10 indicates that the oil behaves like 10 in winter and like
30 in summer.

While I am at it, the following point has not been made succinctly
enough:

   ALL oils get thinner when hot and thicker when cold.  Multigrade
oils just do it less so.

I will also put in my two-bits' worth on Mobil 1:

   In about 1977 I put Mobil 1 in a 76 Honda Civic and got atrocious
oil mileage (< 100 miles/quart).  The consumption went back to 
normal (>2000 miles/quart) with real oil.