[Two Yeets]

I suggest using 5w40 or 15w40 oil. 10w30 insufficient and suggested for soley efficiency. Also, a 5.9/6.7 Cummims oil filter will fit the 5.0, costs half as much and is longer.

Here's the full service manual, incase you ever want to poke around: https://www.nicoclub.com/nissan-service-manuals

 

[Two Yeets]

The 5.9/6.7 filter costs arounf $11 in the US and easy to find on-shelf. The 5.0 filter cost me at least $20 after shipping and has to be ordered online. It cost more and is harder to find for a smaller filter. The larger filter will bring oil level down near the minimum on your dipstick. Because of that, I have a seperate jug of oil used only for filling oil filters. It uses about a quart, so one jug lasts me 5 oil changes which is 25,000 miles. I'll then use my 10 quart jug for only filling the engine. 11 quarts in the system with a larger filter will bring you at least halfway on the dipstick.