Spectro's Heavy Duty Golden semi-synthetic motor oil represents a significant improvement in High Performance motor oils. Conventional all-mineral oil formulations offering high film strength provide only minimum cleanliness, since heavy carbon petroleum-base stocks are used to achieve extra protection. With Heavy Duty Golden semi-synthetic, the need for these heavy mineral oils is eliminated through the use of a complex synthetic that exceeds even the heaviest petroleum oils in film strength, providing a level of protection previously unattainable. The semi-synthetic petroleum blend is a 20W50 formulation specifically for the large air-cooled Harley-Davidson engines. Enhanced additive technology yields improved wear, rust and oxidation resistance, and ensuring longer engine life. Heavy Duty Golden semi-synthetic is rated to the highest possible API service classification SG, and is strongly recommended for all Big Bore, Stroker and High Performance Harley-Davidson engines including gas or alcohol burning Drag-Race motors. This very same oil is used by Scott "The Z-Man" Zampach winning the Harley-Davidson championship in both the AMA U.S. Twins and AMA C.C.S. Twin Sport races without any engine failure.

USE OF SPECTRO PRODUCTS WILL SAFEGUARD YOUR WARRANTY •Frequently asked questions (FAQ) on the application of EU antitrust rules in the motor vehicle sector, August 27, 2012 Zodiac International B.V. hereby states that it meets all American Made Motorcycle Manufacturer's warranty requirements set forth by the motorcycle manufacturer. Remember, choosing an alternative to the O.E.M. is not only allowed by the manufacturer, it is your right as a consumer. USE OF THIS PRODUCT WILL NOT VOID YOUR WARRANTY •You must follow the directions for engine break-in and maintenance as explained in your owner's manual. This oil is compatible with other modern oils and will mix readily unless specified by the manufacturer.