Daewoo 601 - Type Oil ???

Hey Guys, I'm new to the Forum... I haven't searched the archives... I'm wanting to change the Oil and Filter on a 1998 Daewoo 601 ( Yanmar ) Amount and type would be helpful.... Also , is there an online "Manual" ??? . . Gotta Fly... Mike & "Jaz" the Flying Dog . . .

I bought some Rotella 15w/40 for my Case 580K... I'll use the same oil in the 601 DSL . Gotta Fly...