Harley-Davidson branded motorcycle oil is not formulated and blended in-house by the motorcycle manufacturer. Instead, the company contracts with a specialized lubricant manufacturer. Suncor, a Canadian integrated energy company, has held the contract to manufacture and distribute Harley-Davidson branded oils and other lubricants since 2016. This includes engine oils, transmission fluids, primary chaincase lubricants, and fork oils specifically designed for Harley-Davidson motorcycles.
The formulation of these specialized lubricants is crucial for optimal engine performance and longevity. Using oils specifically designed for Harley-Davidson engines ensures the proper viscosity, additive package, and thermal stability required by these unique powertrains. Historically, different manufacturers have held the contract for producing these oils, but the focus has always remained on providing lubricants engineered to meet the demands of Harley-Davidson motorcycles. Selecting the correct lubricant plays a vital role in protecting the engine from wear, maintaining optimal operating temperatures, and ensuring smooth clutch and transmission operation.
