Doosan recommend Morris Lubricants, Liquimatic JDF (U.T.T.O)for both
this meets the specifications:
Allison C4,
Caterpillar TO-2 API GL4 (L20)
they also recommend Mobil Fluid 424
I have been told to use Q8 T400 10W and it seems to work good
I am led to believe all these are just universal tractor oil with anti squeal additives for oil immersed brakes
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