I find that Marvel Mystery Oil also increases pressure. The can says it
increases viscosity of crankcase oils, and it apparently does, but I don't
understand why. I don't use it regularly, though several friends running
various vehicles ranging (VW bug, '89 Subaru, Ford Model A, '65 Ford
Econoline van) use it. Any list wisdom on the stuff?
Jeff
>Well, Larry and Barney were right. Valvoline 20w-50 definately gives
>better oil pressure in my Midget. I tried Castrol 20w-50, Valvoline 10w-40
>and Valvoline 20w-50 and the Val 20w-50 gave the best all around pressure
>at idle and running. On the other hand the Valvoline 10w-40 gave the lowest
>pressure readings.
>
>These readings were taken on a warm engine after a 10 mile run:
>
>Valvoline 20w-50 ....... ... idle = 22 psi ...............running (3000
>rpm) = 35 - 40 psi
>Castrol 20w-50 ................ idle = 15 psi ...............running (3000
>rpm) = 30 psi
>Valvoline 10w-40 ....... ... idle = 10 psi ...............running (3000
>rpm) = 25 -30 psi
>
>Thanks to Barney and Larry for the help
>
>(yeah, I know my bearings are on their way out! :-)
>
>Thanks,
>
>Robert Weeks
>Durham NC
>1969 Midget
>http://www.woozy.com/midget/
_____________________________________________________MV
Jeffrey H. Boatright, PhD
Senior Editor, Molecular Vision
http://www.emory.edu/molvis
jboatri@emory.edu
(404) 778-4113 Phone
(404) 778-2231 FAX
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