[Shotimes] synthetic vs oil pressure

[Donald Mallinson]

Don,

I don't have evidence for the SHO, but when my 1962 Catalina with a 
fresh engine set slightly loose for racing had low oil pressure at hot 
idle, I went from conventional 20-50 racing oil to Synthetic 15-50 
racing oil and hot oil pressure went from near zero to about 9-10 at 
idle, and never got less!    I would call that all the evidence I ever 
needed that synthetics will work better in heat extremes.

I went to HD Diesel blend for my '89 SHO for the track event this year 
at the suggestion of the Amsoil engineers.  the series 3000 HD diesel 
has more high pressure additives and some stuff that is now missing from 
automotive oils because of emissions standards.  Seemed to work well.

The Amsoil engineers didn't recommend going with 50 weight oil due to 
the much tighter clearances in the SHO engine.  So I stayed with a 30 
weight.

Don Mallinson

don donelson wrote:

> I like to get the lists opinion on synthetic oil vs synthetic blend ....
>
>
> What i am trying to accomplish is better oil pressure in my Sr 72 race
> car ... with out totally sacrificing the ability of true synthetic to
> take the higher oil temps that our generated.
>
> Any suggestions ?
>
> dond
> 89 Race preped Super SHO w/ cinncy cowl hood and all the goodies !
> weighs in at 2840
>
> All work performed by yours truly
>
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