Hi, I'm now using delo 100 SAE 40 for my engine. I order it at O' Reilly, 22$ per gallon.
You are just about there. Now, install a quick drain so you don't make a mess at oil change time (vacuum cleaner installation) and learn how to puncture your oil filter before removing also so you don't make a mess.
Some of the rear radiator models may have fan blades that could fail. How about a little help from the rear radiator people?
Cheers for reading the forum for oil advice. You are way ahead of the RV crowd. ^.^d ^.^d ^.^d
Pierce
Look at the fan blades to see if they are fiberglass
If it is you need to change out they have a habit of coming apart and taking out radiator. On the blades you will see the strings of fiberglass. Do a search and you will find pics of fan
Ken
Do search for fiberglass fan and then look at post number 7
Here is my write up on the fan..
Replacing rear radiator fan on 91 U300 Grand Villa (https://www.foreforums.com/index.php?topic=32034.0)