I've looked into this in the past and 5Banger is correct as far as I'm concerned regarding prelubing. It is rare that the bottom end gives trouble before anything else. An engine typically requires attention due to; valve problems, timing component problems, overheating problems or cylinder/piston related problems.

The accumulator is another issue altogether, however. In the case of oil pressure loss it will keep the engine alive a little longer so you can get it shut down before catastrophic failure ensues.

Have a great day,