• Restores up to 14% horsepower1 • Reduces need for costly higher-octane fuel • Reduces noise from carbon rap and pre-ignition • Controls pre-ignition "knock" 1Based on third-party testing in a 2016 Chevrolet* Silverado* 1500, 5.3L V-8 GDI with 100,616 miles, using one tank treated with AMSOIL P.i. Actual results may vary.
Your engine’s top-end is sparsely lubricated and prone to the development of performance-robbing deposits. It’s also highly susceptible to corrosion, an issue compounded by the prevalence of ethanol in today’s fuel. AMSOIL Upper Cylinder Lubricant is designed to solve those issues. Its AMSOIL-exclusive, powerful formulation helps maximize engine power and performance while increasing engine life. And unlike competing fuel additives, AMSOIL Upper Cylinder Lubricant works.
• Helps keep fuel fresh up to 12 months • Protects against varnish and gum buildup • Fights ethanol corrosion • Ideal for stored seasonal equipment such as snowmobiles, lawnmowers, motorcycles and boats