What type of oil in 1979 shovelhead harleydavidson?

The 1979 Harley-Davidson Shovelhead typically uses 20W-50 motor oil for engine lubrication. It's important to choose a high-quality oil that meets or exceeds the API (American Petroleum Institute) specifications of the time. Additionally, for the primary chaincase and transmission, a dedicated primary oil or a suitable gear oil is recommended. Always consult the owner's manual for specific recommendations and guidelines.