recommendations for steering oil D8 14a?

I will be going to pick up my d8 later this week. Should I use a T-02 or T-04 oil in this 1956 machines steering clutch? I keep Mobil 424(T-02 rated) on hand for our john Deere tractor power shift trannies and using it would simplify oil storage but I want to do what is best for the machine. If I should use a T-04 equivalent what weight should I use?

Would delvac 1300 15w40 oil be OK in the engine? Again I have it on hand for the JD tractors.

Thanks, Ross/Nebraska


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