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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

$16.69

Retail Price (USD)
Preferred Price: $12.99
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Free telescoping parts wand with $75 order OR free AMSOIL oil filter with order of 2 gallons Signature Series Diesel Oil or Heavy-Duty Diesel Oil