[C320-list] Yanmar Transmission Oil

[Joseph R Aberdale]

I could not find anything in my Yanmar manual regarding type and weight of oil in the transmission of my Yanmar 3GM30F.

I emailed the Mack Boring rep. who gave a presentation at the Catalina Rendezvous last summer. He said they recommend 15-40 weight oil. Has anybody received any  info. from Yanmar or a Yanmar dealer technician regarding what they recommend?  Motor oil or diesel?

Thanks very much.

Joe Aberdale
#908