If you have soy diesel in your area. You should be good for additional lube.
As far as I've ever heard Arch oil is a good product.
If I had some here, I'd run it.
But then I used to run some Marvel.
I don't have a camper, but I might buy one.
I'd definitely pay whatever I could afford.
I'm not sure what shop rate is around here anymore. But that's my 2nd option.
If I could find roving repair or a shop to do the work
At some point, I started installing a T in.the return line from the engine oil cooler to feed the under the hood bypass filters
I returned to the engine oil fill neck. The nipple in.the fill neck needs to point slightly down into the neck, so oil doesn't splash out, incase you remove the fill...
I had problems with 3 Napa Gold filters and never used them again.
I prefer Baldwin, Wix, Donaldson, Amsoil, Mobile1
If you got the engine from Leroy, his opinion and instructions are really the only opinion that counts
My favorite was actually the Suburban before the GMT400. Our 1989 Heavy half gasser k1500
We had a 1997 K1500 gasser we didn't like and didn't own long.
I bought the 1996 K1500 6.5 in San Antonio and sold the 1997
But the 1989 did rust around here
I also liked the much older Suburbans