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On 4 Mar 2001, at 22:34, Herman Haustein wrote: > I always thought the pressure valves were supposed to kick in at about 30psi > (oil pressure), but, I found on my car that oil pressure varies from 20psi > at idle up to about 50psi at high speed (2500rpm and up)- thats when the > valves kick in . > These pressures are when cold 20w-50w Castrol GTX. The combination of the cold temps and the high viscosity oil combines to keep the pressure relief valves from doing their job. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org