Would the multi weight motor oils be ok to use in the Deuce? (10/30, 10/40, 20/40, 20/50) Its not real easy to find straight 30wt.
Also would any Brand be ok? (Rotilla, Castrol, Pennzoil, exct.)
Or maybe 10/40 Mobil 1 full synthetic?? What actuall did the Army use, 30wt.<img...