Gentlemen,
I wonder if seeking a high oil pressure reading is really the goal here.
Oil flow is the requirement. However, the monitoring of our systems is, of
course, done with a pressure gauge. A flow meter would by nature likely be
more expensive and troublesome.
You may wish to consider two extreme ends of the operating conditions of a
pump:
1) When pumping through an open discharge line with a pressure sensor on the
open discharge pipe the pressure reading will be almost zero and the flow
will be high.
2) When pumping through a pipe with a very small aperture at it's output the
pressure reading of the sensor in the pipe will read high and the flow will
be at a minimum.
Higher viscosity oil is more resistive to flow and therefore replicates the
effect of trying to pump through a small aperture. It may feel good to see
the higher pressure reading, but flow cannot be as much as with lower
viscosity oil, all other factors being the same.
Gary
'73
----- Original Message -----
From: "Bruce Simms" <brucesimms2003@yahoo.ca>
To: <im_sloane@hotmail.com>; <6pack@autox.team.net>
Sent: Friday, October 21, 2005 10:51 PM
Subject: Which Oil Do You Use Anyways?
>A bottle of Lucas Oil Stabilizer, filling the rest of the sump with Castrol
>20W50. From a previous list discussion there are certainly some differing
>and interesting opinions on the Lucas stuff. What I noticed with the Lucas
>is that my start-up oil pressure was restored 5-10 lbs to 80-85 lbs, what
>is was when I bought the 6 7 years ago. Snake oil? maybe. It has a
>honey oil consistency like STP, perhaps this is good for clinging to engine
>parts and preventing dry start-ups.
>
> A supposedly LBC knowledgable mechanc did an oil change shortly after I
> bought the 6. He used 5W30, saying it was good for all cars. I soon
> changed it to 20W50 as I had lower oil pressure. Haven't used him again.
> Tried Mobil 1 15W50 synthetic, my oil pressure was the same as Castrol
> 20W50.
>
> Bruce Simms
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