Bill,
Following this topic up, I found out that an Australian oil company, Penrite
(www.penrite.com.au) are remaking these old oils (with new detergents etc)
for classic and veteran vehicles.
the next question is, how important is this? I've been running EP 85/140 in
the diff for about 2 years. The last time I changed it there was metallic
particle is the oil. Time to worry? It doesn't make any noise.....yet!
Andrew
----- Original Message -----
From: "Bill Traill" <bill@clovermachine.com>
To: <mg-mmm@autox.team.net>
Sent: Thursday, April 26, 2001 12:33 PM
Subject: EP lubricants
> Re: EP lube
>
> I was told by a local oil company chemist that EP (extreme
> pressure) lubricants made for hypoid gears have a lot of sulphur
> content to make them more "slippery". It is an inefficient gear that
> allows a lower drive-line. It is this sulphur that attacks brass and
> bronze bearing retainers, shims, bushings etc. Our gears are just the
> more efficient spiral-bevel...not hypoid. Also, case hardening will be
> lost when the metal absorbs sulphur...but at high temperature (as far
> as I know as a machinist), but I doubt we have case hardened gears.
> ...(a spot of sulphur on a case hardened shaft, bring to local red heat
> and you should be able to drill a hole)....
>
> He recommended to stay with straight mineral base 140 which he
> claimed was still used in heavy construction equipment (25 years
> ago). This he said had chlorine, anti foaming agent etc., but no
> sulphur. As it turned out, the company still had two pails of non EP
> castrol 140 that I bought.
>
> Many years ago I read an article in which the author stated "the TC
> has no love for EP lubricants". Who and where I cant remember but it
> lead to my talking to the chemist.
>
> Bill Traill
> British Cars Web: http://www.team.net/sol
> MMM list subscription info: http://www.team.net/cgi-bin/majorcool
British Cars Web: http://www.team.net/sol
MMM list subscription info: http://www.team.net/cgi-bin/majorcool
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