Has your fuel economy decreased over time? Do you ever notice performance issues like a stumble or hesitation when you accelerate? Do you have concerns about performance reducing carbon buildup? If you answered yes to any of these questions, AMSOIL's high performance gasoline fuel additives may be the solutions for you.
When it comes to maintaining your fuel system, we offer two high quality products:
 | AMSOIL P.i. Performance Improver As an engine ages, it can suffer from gasoline-generated deposits that form on the fuel injectors, intake valves and combustion chamber. Also, ethanol is common in today’s fuel. It can cause moisture to enter your engine, often leading to corrosion and premature wear. This is where AMSOIL P.i. Performance Improver comes in P.i. Performance Improver is our deep cleaning additive. Its potent additive package works to clean your fuel system top to bottom to revive your engine to like- new condition |
 | AMSOIL Upper Cylinder Lubricant Many newer engines use direct fuel injection for increased fuel efficiency and high-power output. This new technology is great. However, it can promote carbon buildup, resulting in reduced performance. If your vehicle uses direct injection, AMSOIL Upper Cylinder Lubricant should be part of your regular maintenance routine Think of AMSOIL Upper Cylinder Lubricant as a maintenance product. The main feature of this product is to regularly lubricate upper cylinders to prevent wear. In terms of cleaning, its focus is on injectors. Upper Cylinder Lubricant is also a great tool to fight ethanol-related corrosion |
| Two Steps for a Clean & Protected Engine Step 1 Deep clean with P.i. Performance Improver every 4,000 miles / 6500 km • Cleans fuel injectors, intake valves and combustion chamber deposits • Remissions and increases fuel economy Step 2 Keep clean with Upper Cylinder Lubricant in every tank • Lubricates upper cylinders to fight wear • Inhibits ethanol-related corrosion • Keeps injectors clean |  |
WHERE TO BUY
1. Shop Online and Get Fast, Free Delivery
Shop online and get your products in 3 business days or less. With free shipping on most orders, and discounts for Preferred Customers (an average 25% savings), shopping online is the fastest way to get AMSOIL products to your doorstep. Becoming a Preferred Customer earns you discounts, points on purchases and more. Simply shop our online store and add a P.C. membership to your cart before checking out.
2. Buy Wholesale
In addition to the Preferred Customer Program for individuals, we offer wholesale programs for commercial businesses that want to use AMSOIL products in their company vehicles and equipment along with wholesale programs for re-sellers and installers. Learn more about all AMSOIL wholesale programs
1. Shop Online and Get Fast, Free Delivery
Shop online and get your products in 3 business days or less. With free shipping on most orders, and discounts for Preferred Customers (an average 25% savings), shopping online is the fastest way to get AMSOIL products to your doorstep. Becoming a Preferred Customer earns you discounts, points on purchases and more. Simply shop our online store and add a P.C. membership to your cart before checking out.
2. Buy Wholesale
In addition to the Preferred Customer Program for individuals, we offer wholesale programs for commercial businesses that want to use AMSOIL products in their company vehicles and equipment along with wholesale programs for re-sellers and installers. Learn more about all AMSOIL wholesale programs