definatly not worth it for our old turds. having ran engines for over 5 mins with NO oil pressure and they are still out there working today, our engines are fine. i had an old EX200 hitachi excavator that always had a hammer or tamper on it. shook the machine to all hell, enough that the pickup tube fell off. idled it off the job onto the lowbed, idled off the lowbed and into the shop. fixed and shipped it. had 45 lbs oil pressure at idle cold. the pumps on our trucks are high volume pumps, oil gets to where it needs to be quick.
the aformentioned lifter tick and such, yes it may quiet it down but it isnt solving the problem. just like putting a electric lift up on to cure air intrusion.
not a single oil filter i install gets filled either. from my personal stuff to everything at work. takes 2 seconds of run time and the gauge is moving. its not like your firing it up and going to WOT full load right away.