Charley........
"diversity of temperatures"? I can't think of two places in the country
(where MGBs would be in regular use, anyway) where the temperatures vary as
much as the temperature variation inside an engine. Some of the passageways
and ports inside an overdrive unit are so small that it seems a straight 30
weight oil can circulate more easily, while providing adequate strength and
lubricating qualities for the gearbox.
That, at any rate, is my logic for using straight 30wt rather than 20-50,
although it is tempered by the fact that I believe shop manuals that stated
"engine oil" were first written before the common usage of multi-weight
oils.
Lawrie
British Sportscar Center
-----Original Message-----
From: Charley & Peggy Robinson <ccrobins@ktc.com>
To: frank krajewski <frankk@intap.net>
Cc: MG List <mgs@autox.team.net>
Date: Tuesday, August 15, 2000 2:44 AM
Subject: Re: OD
(SNIP)
> There was a spirited thread lately about oil viscocities to use in the
>gearbox. I think straight 30 weight won out but for the life of me I
>couldn't see why, given the diversities of temp extremes around the
>country as the seasons change.
>
> Hope this helps,
>
> Charley Robinson
> '69 B
>
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