Low Oil Pressure???

Today I was trucking along and my #### CEL came on and lil red light in the oil gauge.
Pressure was under 40 and wouldn’t rise normally stays around 50.
Pull over shut it down, I was about half a gallon low.
Noticed I had smoke coming from the filler tube (which I’ve never had) I assumed engine oil temp had gotten hot.
Nevertheless when I start it it takes about 5-10 secs before gauge registers pressure. At idle it maintains roughly 15psi when I take off it does fine goes up past 50 like normal as I shift and then rest around 45. The weird thing is the longer I drive the more it drops closer to 40 and dipped right under 40 on my 20 mile drive to the loves.
I haven’t noticed any drop in power etc.
And I’ve read that apparently Detriot has seals that go out in the oil tubes in the pan which creates a loss in pressure.
It’s a DD16 with 450k on it. Any ideas or advice?

 

Yeah I think that maybe the culprit. Thanks for the video!

 

Yep I believe she is ####ed!
Had to add a gallon of coolant this morning,
Oil on dipstick is now overfull (no milky)
And oil pressure is idling at 45-50psi.
Gonna try to get
This get this load off and get it to shop.

 

Thanks I tried that and looks normal. Not sure how fast speedco can do an oil analysis but may try to stop and get oil changed and analyzed

 

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So I just grabbed my clipboard from earlier where I applied the oil drops. And it appears to be a Halo…rekon it needed time to dry…..check out pic.