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AMSOIL P.i.® Performance Improver Gasoline Additive12 oz. Bottle
Product code : APICN-EA
AMSOIL P.i.® Performance Improver Gasoline Additive12 oz. Bottle
Product code : APICN-EA
Current price:
$18.99
Retail Price
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Estimated delivery by Wed, Oct 14
to Columbus - 43215.
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- 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. -
We offer easy returns for customers. If your product is unused and unopened, you may return it within 30 days for a full refund of the purchase price. View full AMSOIL Return Policy.
-
We accept Visa, Mastercard, American Express, Discover and PayPal, and provide secure checkout and encrypted payment processing.
About this item
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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
![Horsepower Comparison]( "Horsepower Comparison")
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.
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star rating
Pleased customerBy DALE, a Verified Buyer from Ohio on October 07, 2026I try to use this at least once every 5,000 miles to keep things clean. It seems to work better than other products I've used so I will be sticking with PI.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
You can feel the powerBy CHRIS, a Verified Buyer from Merritt Island FLorida on October 05, 2026Amsoil IP really does help improve fuel efficiency. I can always feel the power increase once i use a bottle in a tank of gas.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Great for mpgBy EDWARD, a Verified Buyer on October 04, 2026Amazing product. I use this every oil change.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Gas AdditiveBy STEPHEN, a Verified Buyer from Scarborough on October 04, 2026Great product -Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Gas additiveBy joebudwiser, a Verified Buyer from VA on October 03, 2026GOOD STUFFBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Very good productBy EARL, a Verified Buyer from Macungie, PA on September 29, 2026I put this treatment in my cars tank about 5 or 6 times a year. The engine runs really well and gas mileage has improved over time. The only small problem to me is the plastic seal under the cap. It can be tough to remove.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
PI fuel injection cleanerBy DON, a Verified Buyer on September 28, 2026Good product motor runs smooth… if running on long highway travels… it’s helps the cleaner circulate through better..Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best oilBy PETE, a Verified Buyer from Minnesota on September 26, 2026Been using for years, best oil on the market. Highly recommend !Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Muy buenoBy JONATAK, a Verified Buyer on September 23, 2026Es un producto muy buenoBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Strong cleanerBy WILLIAM, a Verified Buyer from AZ on September 22, 2026I have a 2022 BMW with 20,000 miles. I've been noticing the engine has a little stumble now and then at idle at a stop light. I put a whole bottle of this injector cleaner in with a full tank of gas. By the time I'd used a half of a tank of gas the engine idles so smooth that I can't even tell if it's running or not. I look at the tachometer and it's idling very nicely and smooth. This stuff works !!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
WARRANTY-
- 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. -
We offer easy returns for customers. If your product is unused and unopened, you may return it within 30 days for a full refund of the purchase price. View full AMSOIL Return Policy.
-
We accept Visa, Mastercard, American Express, Discover and PayPal, and provide secure checkout and encrypted payment processing.
-
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
![Horsepower Comparison]( "Horsepower Comparison")
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.
-
-
-
star rating
Pleased customerBy DALE, a Verified Buyer from Ohio on October 07, 2026I try to use this at least once every 5,000 miles to keep things clean. It seems to work better than other products I've used so I will be sticking with PI.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
You can feel the powerBy CHRIS, a Verified Buyer from Merritt Island FLorida on October 05, 2026Amsoil IP really does help improve fuel efficiency. I can always feel the power increase once i use a bottle in a tank of gas.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Great for mpgBy EDWARD, a Verified Buyer on October 04, 2026Amazing product. I use this every oil change.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Gas AdditiveBy STEPHEN, a Verified Buyer from Scarborough on October 04, 2026Great product -Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Gas additiveBy joebudwiser, a Verified Buyer from VA on October 03, 2026GOOD STUFFBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Very good productBy EARL, a Verified Buyer from Macungie, PA on September 29, 2026I put this treatment in my cars tank about 5 or 6 times a year. The engine runs really well and gas mileage has improved over time. The only small problem to me is the plastic seal under the cap. It can be tough to remove.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
PI fuel injection cleanerBy DON, a Verified Buyer on September 28, 2026Good product motor runs smooth… if running on long highway travels… it’s helps the cleaner circulate through better..Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best oilBy PETE, a Verified Buyer from Minnesota on September 26, 2026Been using for years, best oil on the market. Highly recommend !Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Muy buenoBy JONATAK, a Verified Buyer on September 23, 2026Es un producto muy buenoBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Strong cleanerBy WILLIAM, a Verified Buyer from AZ on September 22, 2026I have a 2022 BMW with 20,000 miles. I've been noticing the engine has a little stumble now and then at idle at a stop light. I put a whole bottle of this injector cleaner in with a full tank of gas. By the time I'd used a half of a tank of gas the engine idles so smooth that I can't even tell if it's running or not. I look at the tachometer and it's idling very nicely and smooth. This stuff works !!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
