What oil to use in 2002 FXDWG?

For a 2002 Harley-Davidson FXDWG (Dyna Wide Glide), it is recommended to use 20W-50 motor oil specifically designed for motorcycles, particularly those that meet API (American Petroleum Institute) standards. Harley-Davidson's own synthetic or semi-synthetic oils are popular choices, but any reputable brand that meets the required specifications will work. Always check the owner's manual for specific recommendations regarding oil type and maintenance intervals.