I'd like to thank Russ for pointing out that I WAS COMPLETELY BACKWARDS
as far as oil viscosity goes.....
In fact, 20w50 means oil acts like 20 weight at 0, and 50 weight at
100 deg C...
So, using the earlier 43 deg C (110 deg F) assumption, and linear
viscosity change, the viscosity of 20w50 would be 32.9 (instead of the 37
I figured from the backwards calculation.)
Sorry for any confusion, but I have been getting a good 3 to 3 1/2 hours of
sleep per night......sleep deprivation? Naaaaaa....
Eric L. Van Iderstine - ME senior - Mississippi State University
Design Coordinator - MSU Formula SAE......Powered by Honda......
elv1@Ra.MsState.Edu http://www2.msstate.edu/~elv1
74 MGB & 85 Buick (until I finish the MG)
---------- Forwarded message ----------
Date: Mon, 23 Oct 1995 08:25:27 -0800
From: Russ Wilson <russ@scubed.com>
To: "Eric L. Van Iderstine" <elv1@Ra.MsState.Edu>
Subject: Re: SU Damper Fluid
>SAE 20w50 means that the oil acts like a 50 weight at 0 deg C, and a 20
>weight at 100 deg C....So the viscosity decreases (easier to flow at high
>temps) with temp....
Uh oh; the above sentence shows clear signs of sleep deprivation. Better
do *another* 4 hours in the sack. With that sort of backward viscosity
performance from an engine oil you'd have a hard time starting at 0 deg and
have poor oil pressure at 100 deg.
Russ (pass the decaf, please) Wilson
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