The formulation and manufacture of lubricants specifically designed for Harley-Davidson motorcycles is undertaken by several entities. While Harley-Davidson licenses and distributes its own branded oil, the actual production is often outsourced to specialized lubricant manufacturers. This involves creating formulations that meet the unique engine requirements of Harley-Davidson motorcycles, including their air-cooled and V-twin engine designs. For example, specific viscosity grades and additive packages are essential for optimal performance and protection.
High-quality motorcycle oil is critical for engine longevity and performance. Proper lubrication reduces friction and wear within the engine, minimizing the risk of damage and extending the lifespan of critical components. It also contributes to optimal engine temperature regulation, which is particularly important in air-cooled engines. Historically, motorcycle oil formulations have evolved significantly, driven by advances in engine technology and the increasing demands placed on lubricants. Understanding the source and quality of the oil used in a Harley-Davidson motorcycle is therefore crucial for maintaining its performance and value.