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AMSOIL P.i.® Performance Improver Gasoline Additive
Product code : APICN-EA
- 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.
AMSOIL P.i.® Performance Improver Gasoline Additive
AMSOIL P.i. is a potent gasoline performance improver with concentrated detergent that aggressively cleans stubborn, power-robbing deposits from injectors, valves and the combustion chamber. Effective in port and direct injection systems. Bottle compatible with capless fuel systems. Cleans entire fuel system in one tank of gasoline. For use with cars and trucks. Treats up to 30 gallons. Add entire bottle to tank at fill-up. For best results, clean your fuel system with P.i. every 4,000 miles (6,400 km). Do not use with diesel or two-stroke engines.
See the Product Data Bulletin for full details.
MAXIMUM DEPOSIT CLEAN-UP
- Helps keep valves clean and moving freely.
- Aggressive additives attack the most common forms of engine deposits and limit their effects.
REMOVES FUEL-INJECTOR DEPOSITS
- P.i. removes deposits and keeps injectors functioning as they should.
- Testing shows P.i. restored GDI fuel injectors to a 100% flow rate after one tank of fuel.2
RESTORES HORSEPOWER
- Third-party testing demonstrated performance of P.i. using a 2016 Chevrolet* Silverado* with 100,616 miles on the odometer.
- Following a single treatment with P.i., the truck measured an incredible 14% improvement in horsepower.1
CLEANS COMBUSTION CHAMBER DEPOSITS
- Fights combustion chamber deposits to help restore power, control knock, increase fuel economy and reduce the need for higher-octane fuels.
- Protects against compression loss, difficulty starting and rough idling.
- Reduces possibility of "carbon rap," when deposit buildup causes the piston to hit the cylinder head.
- Decreases the possibility of pre-ignition "knock" or "pinging."
CAPLESS-COMPATIBLE BOTTLE
- Bottle is fully 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.
AMSOIL P.i.® Performance Improver Gasoline Additive
Warranty
WARRANTYData Bulletin
SDS
AMSOIL P.i.® Performance Improver Gasoline Additive
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star rating
Actual mileage gain!By DAVID, a Verified Buyer from Champlin, MN on July 07, 2025Have used every product imaginable over the years with little to no improvement in throttle response or gas mileage. I treated a full tank (16 gallons) in my 23 CT4 Blackwing twin turbo V6. She typically gets 19.2 city / 27.2 hwy (best ever on a 350-mile trip). Filled up again drove 520 miles there, 130 miles around town while there and 530 back at an average of 29.3 mpg an increase of 7.7% and a 5% increase around town since back! I'll keep track of how long the effects last.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Gasoline PI.By TOM, a Verified Buyer from Las Vegas NV. on July 06, 2025PI. Restarts all your fuel injectors. And you can really tell the difference in this one. I had old engines that wouldn't hardly start until I started using this additive and it is great I will Continue to use this product until I do pass away again.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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The bestBy AARON, a Verified Buyer on July 04, 2025Worked like it says it does!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Great Product!By JAMES, a Verified Buyer from WA on July 04, 2025I have a 2003 Ford Explorer Sport with 299K miles on it. I have been using various name brand fuel additives over the last 100K miles with placebo effects. After one tank with AmsOil PI I noticed a definite increase in accelerator response and a smoothness in engine performance. I am sold and will continue to use PI every 4K miles.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Trust it!By Happy, a Verified Buyer from Indiana on July 04, 2025Use this in my jeep. Truly believe it works. Thanks!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Amazed!By KEITH, a Verified Buyer from Florida on July 03, 2025I added the Amsoil P.I. Performance gas additive the week before an oil change. I was getting 23-24mpg per tank before adding the product. During that tank the mileage started approaching 25mpg. Did the oil change, transmission drain (Amsoil Transmission fluid), and changed coolant (sorry not Amsoil, they don't make the product for my Hyundai. The tank after the oil change my milage was up again to just under 26mpg. I am now almost four weeks out from the time I added the additive to the gas tank. I am averaging just at or a little above 226mpg every tank. Simply amazed!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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AwesomeBy YANI, a Verified Buyer from Ontario on July 02, 2025Works great, cleans injectors and helps maintain better fuel mileage. I use it in all 8 of my vehicles every 5kBottom LineYes, I would recommend this to a friend.Was this review helpful?
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This stuff is great!By ALEX, a Verified Buyer from Arizona on July 01, 2025Just run this in your tank. Your car will be happy.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Great StuffBy CLIFFORD, a Verified Buyer from Vernon on June 27, 2025Great stuff. Well recommendedBottom LineYes, I would recommend this to a friend.Was this review helpful?
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great productBy RICH, a Verified Buyer from 69130 on June 26, 2025This is amazing, improved performance on all my vehicles. Improved my gas mileage.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
