What weight of oil should you use in a harley Davidson 2007 heritage softail?

For a 2007 Harley-Davidson Heritage Softail, it is recommended to use 20W-50 synthetic oil for optimal performance, especially in warmer climates. If operating in colder conditions, you might consider 10W-40 oil. Always check the owner's manual for specific recommendations and ensure that the oil meets the necessary specifications for Harley-Davidson motorcycles.