Oil pressure drops 2003 7.3 97k

[JMHVAC]

Truck starts fine, as soon as you start going down the road oil pressure drops off. Truck stays running. Replaced sensor and checked pressure at sensor. Pressure is at 10psi idle when you get on it drops to 4-5 psi. Fresh oil and oil filter..

Thanks

[International Tech]

check for leaks around the front crankshaft. if there is a leak it could be sucking air into the gerotor oil pump. 10 psi is to low.