There is a segment of products that do triple duty...

Cleaning, Lubricating and Preserving.

They do these fairly well, but in my mind the oil
aspect feels a bit lite. In automotive thinking the
thickness or viscosity of the oil is quite important.

Why?

Heavier oils keep metal parts from rubbing together
better.

So, my thoughts are that a new gun is many mechanical
parts that haven't been working as a team so much yet.

Hitchcock 45 is a legend, but many of his guns are not
new.

I tend to watch and listen to Jerry Miculek, a pro
shooter with many championships to his name. Additionally
he shoots a S&W PC M&P 15. He preaches running and keeping
the rifle "wet".