Harley-Davidson motorcycles do not require a special or proprietary type of motor oil. However, it is recommended to use oils that meet the specific requirements outlined by Harley-Davidson for optimal performance and protection of their engines.
Harley-Davidson has its own line of motor oils, commonly known as Harley-Davidson Screamin' Eagle Synthetic Motorcycle Oil or Harley-Davidson Genuine Motor Oil, which are formulated to meet the specific needs of their engines. These oils are designed to provide excellent lubrication, cooling, and protection for Harley-Davidson motorcycles.
That being said, there are other reputable brands of motor oil on the market that meet the necessary specifications and requirements for Harley-Davidson motorcycles. It is essential to choose an oil that meets the manufacturer's recommended viscosity and quality standards, which are typically outlined in the owner's manual or provided by the manufacturer.
To ensure the best performance and longevity of your Harley-Davidson motorcycle's engine, it is recommended to follow the manufacturer's guidelines regarding oil change intervals and use oils that meet the specified requirements. Regular maintenance and using high-quality oils are crucial for the proper functioning of any motorcycle's engine, including those made by Harley-Davidson.