Chemicals & Fluids › Synthetic Straight Weight Lubricant Image 1 of 1 Synthetic Straight Weight Lubricant $23.49 Sold Out Certified warranty compliant: API-SH/CG-4 serviceCustom formulated for the Harley-Davidson pre-Evolution® enginesReduces friction for Less Drag—More Power®High temperature film strength improving anti-wear protectionReduces engine temperature and detonation Sold Out Added! Certified warranty compliant: API-SH/CG-4 serviceCustom formulated for the Harley-Davidson pre-Evolution® enginesReduces friction for Less Drag—More Power®High temperature film strength improving anti-wear protectionReduces engine temperature and detonation