Hello! Welcome to Mart's Garage. In this week's video I turn my attention to the first of my flathead stash. Lets delve into this old 59A flathead and see if it is suitable for rebuild. People mention use of detergent and non detergent oils. From what I saw in this motor it lead me to form some opinions on that score. So sit back and chill while I get elbows deep in this dirty old flatty. Mart.