99816-50/0 Heavy Duty SAE 50

Spectro Heavy Duty SAE 50 is a straight-weight mineral motor oil specifically formulated for Harley-Davidson pre-Evolution engines. Designed for use in moderate climates with temperatures ranging between 5 and 32 degrees Celsius, this lubricant provides the necessary film strength to protect older engine architectures. Spectro Oils of America utilizes a refined petroleum base that meets OEM 99816-50/0 requirements, ensuring compatibility with vintage internal components. This oil helps maintain oil pressure and provides essential protection against wear and oxidation in traditional air-cooled V-twin engines that require a heavier single-grade lubricant.