10W-40 Multi-viscosity Klotz American V-Twin Synthetic TechniPlate Lubricant is custom-formulated for the Harley Davidson air-cooled engine. Exceeds all warranty requirements for Harley Davidson engines. Use of this lubricant provides certified warranty compliance and protection. Will not shear like petroleum oils and stays-in-grade even under the most stressful situations. The high power output and piston speeds of the V-Twin engine demand the protection Klotz TechniPlate advanced lubrication technology provides.