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  • P.i. Performance Improver Gasoline Additive

    P.i. Performance Improver Gasoline Additive


    • Restores up to 14% horsepower1
    • Restores GDI fuel injectors to 100% flow rate after one tank of fuel2
    • Improves fuel economy
    • Reduces need for costly higher-octane fuel
    • Helps prevent carbon rap
    • Controls pre-ignition knock
    • Compatible with capless fuel systems

    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.
    2ASTM D5598(M) – 2013 Buick Regal test vehicle.

    View Detail Page Warning - Click here for Proposition 65 information for this product
    Current price:

    $16.69

    Retail Price (USD)
    Preferred Price: $12.99
    Save: $3.70 Learn More
    Current price:

    $16.69

    Retail Price (USD)
    Preferred Price: $12.99
    Save: $3.70 Learn More
  • Upper Cylinder Lubricant

    Upper Cylinder Lubricant


    Preserves Horsepower and Performance

    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.
    View Detail Page Warning - Click here for Proposition 65 information for this product
    Current price:

    $5.79

    Retail Price (USD)
    Preferred Price: $4.49
    Save: $1.30 Learn More
    Current price:

    $5.79

    Retail Price (USD)
    Preferred Price: $4.49
    Save: $1.30 Learn More
  • Quickshot®

    Quickshot®


    • Cleans powersports fuel systems
    • Addresses ethanol-related performance issues
    • Stabilizes fuel during short-term storage
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    Current price:

    $11.89

    Retail Price (USD)
    Preferred Price: $9.19
    Save: $2.70 Learn More
    Current price:

    $11.89

    Retail Price (USD)
    Preferred Price: $9.19
    Save: $2.70 Learn More
  • Gasoline Stabilizer

    Gasoline Stabilizer


    • 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
    View Detail Page Warning - Click here for Proposition 65 information for this product
    Current price:

    $15.09

    Retail Price (USD)
    Preferred Price: $11.69
    Save: $3.40 Learn More
    Current price:

    $15.09

    Retail Price (USD)
    Preferred Price: $11.69
    Save: $3.40 Learn More
  • DOMINATOR® Octane Boost

    DOMINATOR® Octane Boost


    • Increases octane up to 4 numbers for improved performance
    • Maximizes power
    • Reduces engine knock
    • Improves ignition & responsiveness
    • Helps fuel burn more cleanly
    • Removes carbon deposits

    View Detail Page Warning - Click here for Proposition 65 information for this product
    Current price:

    $12.39

    Retail Price (USD)
    Preferred Price: $9.89
    Save: $2.50 Learn More
    Current price:

    $12.39

    Retail Price (USD)
    Preferred Price: $9.89
    Save: $2.50 Learn More
  • Motorcycle Octane Boost

    Motorcycle Octane Boost


    • Increases octane up to three numbers
    • Maximizes power & performance
    • Helps eliminate engine knock & ping
    • Cleans harmful deposits
    View Detail Page Warning - Click here for Proposition 65 information for this product
    Current price:

    $5.99

    Retail Price (USD)
    Preferred Price: $4.79
    Save: $1.20 Learn More
    Current price:

    $5.99

    Retail Price (USD)
    Preferred Price: $4.79
    Save: $1.20 Learn More
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