Overdrives appear to tolerate most things except aftermarket additives,
synthetics should be better as they are designed for a particular use rather
than being refined from base stock. Modern GL5 gear oils should never be
used in a Triumph diff as the additives attack the copper thrust washers but
there are synthetic/semi synthetic gear oils to GL4 for precisely these
conditions.
John Kipping
----- Original Message -----
From: "J Wagner" <jmwagner@greenheart.com>
To: "Jack W. Drews" <vinttr4@geneseo.net>
Cc: <fot@autox.team.net>
Sent: Friday, May 16, 2003 1:02 PM
Subject: Re: Oil - what kind?
> So now that everyone has chimed in on motor oil, what about the
> transmission? ...with overdrive...?
>
> ---Justin
>
> Jack W. Drews wrote:
>
> >About twice a year folks on the lists discuss oils -- and like belly
> >buttons and opinions, everybody has one. Today I found myself standing in
> >the oil department trying to decide which magic elixir to use when I take
> >the break-in oil out of my engine. After all these years, I don't REALLY
> >know which is best.
> >
> >Should I go with all synthetic, synthetic blend, or just dino juice? And
> >should I go with really light stuff, like Mobil 1 0-30 weight to
hopefully
> >make more hp, or with 40-50 wt to make sure everything is protected?
> >Furthermore, on what basis could I make a halfway intelligent decision?
> >Everybody seems to have success stories.
> >
> >Sooo....here's a survey of a different sort: Has anybody had a BAD
> >experience with an engine that they could directly attribute to the kind
of
> >oil they were using?
> >
> >uncle jack
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