You better stick with straight weight oil for your 2 cycle just like Detroit recommends. ...I suppose you could use any oil you want, but not good for engine life.

Here's a condensed version of their recommendations and where to find the info straight from Detroit/MTU

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-