just one thing Dave, the factory "oil cooler" is more of an "oil temp
moderator". Helps in warm up of engine but really can't pull oil
temps down that much as compared to a "little radiator type" oil cooler.

alistair

On 5-Aug-10, at 7:56 AM, Dave Mcneely wrote:

So, this beast has a factory oil cooler, as we all know.  Do these
sometimes go bad, perhaps having either oil or coolant channels
partially blocked?  Is oil temperature (separate from coolant
temperature, which is picked up on the thermostat housing I believe)
the likely reason for these variations in oil pressure indication as
I suspect?  If so, is there a fix, so that oil pressure remains at 30
psi or so even at high ambient temperatures, and does not drop below
5 psi (which brings the blinker on I believe) at idle?