hello, I make the first oil change my tractor Kubota B2320, in Brazil not sell original oil Kubota, I'm with much doubt, someone can help me in relation of the oils below:
Shell Rimula R4 API CI-4, GC-4, 4-CF, CF.
Shell Rimula R3 API CH-4, GC-4, 4-CF.
Tection Castrol 15W40 API CI-4 / SJ...