Bob O'Shaughnessy wrote:

>      It  seems that I'm having a bit of an oil pressure problem.  My new
> (around 3k miles) engine starts up fine with 60+ psi, but after warming
> up, especially after a long, sustained run (like freeway time) idle
> pressure dwindles to around 10!  2000 rpm pressure barely makes 20 psi.
>      The drop in pressure seems to be related to temperature, as the
> pressure remains in the good range till a few minutes after the temp
> gauge settles in and the thermostat opens.
>      I'm reading all this with a VDO dual sensor, on an extension hose,
> mounted next to the coolant expansion tank on the heat shield.  Valvoline
> 10-40 dino juice, proper Mann filter.
>      I haven't yet checked out the pressure relief valve.
>      Interestingly, I didn't notice low pressure before I re-sealed my
> oil pump, which was leaking due to me forgetting a gasket.
>      I was wondering a bit about crankcase pressure, and stood staring at
> my engine for a good ten minutes trying to remember if the damn thing had
> a PCV valve.  The only thing that approaches one, it seems, is the stack
> where the alternator stand would go if this were a type 1 engine.
>
>      Any suggestions?

Shaun Et. Volks al,
I had similar problem, only using 10-30w synthetic Royal Purple and Prolong.
Group members suggested many options to my oil light flashing on at hot idle.
Switched to Royal Purple synthetic 20w50 w/Prolong. Problem solved.
Consider switching to a synthetic 20w50 oil, worked for me.
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Shalom
Mark B. Magee
87GL
91 Westy
96 Suzuki 4WD Sport
Kemah TX USA
John 14:6