1999 Jeep Cherokee

Engine problem
1999 Jeep Cherokee 6 cyl Two Wheel Drive Automatic 155000 miles

I own a 1999 Jeep Grand Cherokee, recently while driving my " check guages" light came on. I noticed that the oil pressure dropped when I either slowed down or stopped. While driving the guage read around 45 psi but when I stopped it dropped to around 10 psi. After making it home I let the Jeep cool down and went to crank it again, no problems at all, no drop in pressure. The next day the same thing happened. Any suggestions on a cure for this?
December 23, 2007.

Get an engine flush and then check the actual oil pressure with a mechanical oil gauge if its normal test the oil pressure sending unit.

Dec 23, 2007.