Hello John and Frank

Many thanks for your interesting and informative replies about these
oils/greases. Forest Lubrication is obviously an interesting supplier, and the
relationship with Penrite begins to explain some of the mysteries associated
with these badged (but high quality) oils. I guess that information about the
various additives in the Penrite range will remain a commercial secret for a
long time! Also, are Penrite oils in the UK different from Australian Penrite?

I've very happily used Penrite Shelsley 30 or 40 (straight, non-detergent) oils
in my 1935 17HP for a long time; I can't possibly say whether this has been
"better" in any respect than the corresponding Castrol Classic 30 which seems
to fit with ASM's original Castrol SAE 30 recommendations, but I have no reason
to complain (though Penrite commands a financial premium). The pre-selector
gearbox has (hitherto) been very happy with Shelsley 30.

For many years I have used semi-fluid grease for many applications, especially
King pins and track rod joints. Subjectively and as a non-expert, I feel that
this has great benefits (David - this answers your request for opinions) over
either heavy oil or grease. The semi-fluid grease has very odd rheological
properties: it flows pretty easily, yet it sticks very tenaciously. It is
quite unpleasant to handle, in that it flows so well that it drips out of
"loaded" King-pins and steering joints, but it so so tenacious that it sticks
to tyres, garage floors, etc - much more so than ordinary oil or grease. (Not
nice if it drips up one's sleeve!!) I (maybe naively?) feel that these are good
properties for pre-war lubrication points - it will be interesting to see
whether there is agreement! I use it also on hubs, is this a good idea?

I have heard of King pins being unduly worn by the uninformed use of grease,
instead of oil as advised by ASM (the spiral grooves in the bushes do not seem
to be conducive to the free flow of grease to all bearing surfaces). Yet the
ASM-recommended heavy oil flows too easily, and needs replenishment often. I
think (experts please comment) that semi-fluid grease avoids both these
problems.

Comments please!

Happy motoring,
Michael


Quoting JPeatling@...:

> Hello Michael -
> yes it is correct that Forest Oils do supply Penrite and when I last visited
> there were many Penrite containers in their yard awaiting filling.? However
> when I queried the possibility of buying?Penrite Oil direct from them the
> chap was a little cagey about it and did say that the formulation of Penrite
> was confidential and they wouldn't supply direct, which I accept.? I have
> spoken to Frank on the subject and my view is that if you require Penrite
> specifically you must bite the bullet and pay their premium price.? As you
> may have seen in the latest Sphinx I am an advocate of their oil for the
> Whitley rear axle.? Regards - John
>
> -----Original Message-----
> From: m.l.g.gardner@...
> To: Siddeley@yahoogroups.com
> Sent: Tue, 7 Jul 2009 23:03
> Subject: Re: [Siddeley] Re: Help! 18hp Limousine Brakes
>
>
>
> Dear Frank
>
> Can you please supply any more info re Forest Oils? I've never heard of
> them,
> nor does a quick search reveal anything. I've been pleased with Penrite
> goods,
> but if Forest Oils are their supplier, then this is worthwhile information.
> Is
> the "Red Solid Oil" like (or same as) semi-fluid grease? If we can obtain
> spec
> & prices of Forest Oils products, then this could very useful!
>
> best regards,
> Michael
>
> Quoting Frank Cooke <cookef@...>:
>
> > Hello David,
> >
> > Since you ask I suggest you try the Red Solid Oil from Forest Oils just
> > down the road from you. They have it gallon cans and, while it runs
> > under load it does not drip when you stop. Forest Oils also sell
> > straight SAE 30 , 40 & 50 in 5 gallon cans. They provide these oils to
> > such as Penright, and others, who then do a little Badge Engineering
> > before selling them on. Prices are most acceptable. I have used them for
> > years with no complaint.
> >
> > Frank
> >
> >
> > ------------------------------------
> >
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> >
> >
> >
> >
>
>
> --
> Prof. Michael L.G. Gardner
> Hazelhurst Brow Farm
> Malvern Road
> BRADFORD BD9 6AR
>
> tel: 01274-490849
> fax: 01274-546173
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--
Prof. Michael L.G. Gardner
Hazelhurst Brow Farm
Malvern Road
BRADFORD BD9 6AR

tel: 01274-490849
fax: 01274-546173
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