Or replace you oil pressure switches, the low pressure one should not
activate until .3 bar (4~5 psi), the high pressure one I always recommend
replacing at the same time, even though both are a PITA to replace. I have
also found Castrol 20W50 to carry better pressure at high temps.

Karl Mullendore
Westy Ventures
1987 Syncro Westfalia 1.9TD

----- Original Message -----

> Randy-
> My '89 westy did the same thing.  The oil light used to come on once in a
> great while after extended highway cruising only when the outside temp. is
> high and I had the AC on. Now that I replaced the thermostat it comes on
> more often and without regard to outside temp,etc.  My only thought is
that
> it just wasn't reaching full operating temperature before which now it
does
> quickly(I can see that on the temp guage).  Funny thing is I have an oil
> pressure guage too and it seems to idle at about the same pressure as it
> used to (just below 10psi like you said). I assume you've taken the usuall
> steps of correct weight oil (20/50), correct filter, etc. I guess we'll
have
> to face facts that our main bearings aint what they used to be.
> -Michael
> Augusta, Mo.