Stop in for a cup of coffee

So, started Fargo this morning, collapsed lifter…
Checked oil, 1 Qt low so added.
Ran it for a while, on fast idle as it warmed up. Kicked it down to low idle and lifter pumped back up. Not due for an oil change yet, but may do it anyway.
Is that a Magnum? (I can't remember) I have one that acts up from time to time on my 3.9. It can be with fresh oil or about time to change. It goes away after a few min. And I have 150,000 on it so oh well.