I'm hoping its just a sensor problem in my case, but the car's oil pressure is very good at idle and cruise. Just recently I noticed that once the car gets up over 3000 rpm the gauge starts dropping and as the rpm's build the more it drops until the Check Gauges light comes on.
Now I'm using the stock gauge mod with a mustang sensor installed, and the only thing I've changed is the gauge itself in the cluster.
I'm installing an actual oil pressure gauge tomorrow so I'll know for sure if its a prob with the motor or just a sensor glitch.
I was also thinking of the pick up tube, and when I refreshed the bearings last spring, the tube didn't seem to sit quite right where it connects at the block, and I reseated it and tried 3 different gaskets on it.
Fraser