Probably also says to use Diesel #2 and ordinary atmospheric air... I don’t know HOW we keep these things running with such out-of-date information, heh?Manual says 10w-30 but it was written 30 years ago. Wondering what everyone uses?
And the engine was made before those items were on the market as well... That engine was designed around what WAS on the market. (I won’t put synthetic oil in my 1934 Harley either.)Manual was written before synthetic motor oil was available, and before 5W-40 and 0W-40 viscosity oil...