318 magnum,is my oil pump failing?

i have a 1994 318 magnum motor in a 4x4 thats been giving me some odd readings.
i run regular 10-40 in it.
it will show around 40lbs pressure warmed up,
but can and will drop low enough to pop the oil light at times,
sometimes while Driving others when coasting to a stop.
this Doesnt happen All the time either which is why im a bit puzzled.

initially i thought i had bad bearings,but the pressure comes right back up to 40??
theres no noise at all/complaints from the engine itself.
i...

318 magnum,is my oil pump failing?
Author: BeatersRus