Re: SpeediFour and SpeediTwin oil ratio?

[Mumbles]

quote Garry in Tampa:

Hi Mumbles – Your ’42 chart was upgraded in the 1950s. Here in one from ’47 that hasn’t been upgraded.

Actually, my first two lists are from the ’54 manual which shows they cut down on the amount of oil needed by half from the ’47 manual. The ’60 manual shows 3/4 pint per gallon to, same as the ’54 manual. Maybe by the mid-fifties they realised the motors didn’t need all of that oil recommended earlier if the oils were improving.