When to worry about engine noises?

How has no one tagged @Johnny Mac yet. If you have a warranty concern, I suggest letting the people who handle the warranty make the decision. Find a way to get their ears on it and let them tell you it’s ok or it’s not. What ever they say ask for it in writing.
THANK YOU! @TT5.9mag .

lots of speculating here, and between rocker adjustment, oil viscosity, and header leak, we likely have our culprit in one of them. It's easy to get hung up on oil pressure, and pass over gauge integrity, oil viscosity, operating temps, etc.

I have been doing this a long time, and I can't say that 25 psi at 190 degrees while idling at 700 rpm sets off my "thing things gonna blow" meter. Especially with gauge variance.

The Rotella is only mentioned in the manual for flat tappet engines, which we hardly build anymore.

I will shoot the OP a pm, and we'll gladly help to figure it out. I'm always here for you guys if needed.