This is a real possibility.  I had this situation, and cured it with a Ten Cent Life external oil cooler.  As I related on here before, I realized what was going on when I drove up Raton Pass from 100+ F summer heat through a thunderstorm in which the ambient temperature dropped to 45 F and watched the oil pressure rise from about 15 psi cruising to over 40 psi when cruising at the top of the pass.

mcneely

---- Raymond Markett <raym02@YAHOO.COM> wrote:
> Is it possible that your engine oil is getting too hot? Perhaps the oil cooler malfunctioned after being disturbed.
> Oil pressure tends to drop as the oil heats up.
>
> Sent from my iPhone
>
> > On Feb 28, 2015, at 11:44 AM, John Rodgers <jrodgers113@GMAIL.COM> wrote:
> >
> > Oil is Kendall GT-1 20W50.
> >
> > At idle, flickering light, turn the engine off, then restart, the light no
> > longer flickers. It might, or it might not, flicker at the next stop.
> >
> > I have never had a low oil pressure indication before. But the engine was
> > out of service while the oil cooler seal was replaced and two pushrod tubes
> > were replaced on the side opposite the oil pressure switch. That switch was
> > undisturbed. When the van was again put on the road, the first time out,
> > the light flickered at a stop. Am mystified why it has never flickered
> > before, now suddenly it does. Engine has 114, 000 odd miles on it.
> >
> > John
> >> On Feb 28, 2015 12:58 PM, "Dan N" <dn92610@gmail.com> wrote:
> >>
> >> either the oil pressure sensor are bad or you have a low oil pressure ..
> >>
> >> what grade of oil are you using?
> >>
> >> On Sat, Feb 28, 2015 at 10:45 AM, John Rodgers <jrodgers113@gmail.com>
> >> wrote:
> >>
> >>> The oil pressure light comes on after a long run at speed when I have to
> >>> drop to idle and stop for traffic or a stop light. Doesn't happen every
> >>> time but frequently enough to keep me spooked. I have checked the wires
> >>> and
> >>> found no faults. What is happening. What else might cause this?
> >>>
> >>> John
> >>
> >>

--
David McNeely