The engine was then disassembled once again to see the impact P.i. had on deposits. These testing images show the powerful cleaning performance of P.i on injectors, cylinder heads and spark plugs to significantly restore power and efficiency.
P.i. cleans your entire fuel system and restores up to 14% horsepower* in one tank of gasoline.
- Reduces need for costly higher-octane fuel
- Reduces noise from carbon rap and pre-ignition
- Restores power and performance
- Controls pre-ignition “knock”
- Improves fuel economy
- Capless compatible
This article is part of our Fuel and Fuel Additives guide. See every article in the guide.
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Start with AMSOIL synthetic motor oil and find the exact AMSOIL products for all your vehicles with the AMSOIL Product Guide.







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AMSOIL Staff are experts in high-performance automotive, powersports, marine, diesel, heavy duty equipment, agricultural, and industrial lubrication.
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