AMSOIL P.i. Performance Improver Gasoline Additive
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P.i. Performance Improver Gasoline AdditiveHelp

P.i. Performance Improver Gasoline Additive Product Image
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$13.45 Retail Price (USD)
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Product Code: APICN-EA
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P.i. improves fuel mileage an average of 2.3% and up to 5.7%. Reduces emissions such as hydrocarbons (HC) up to 15%, carbon monoxide (CO) up to 26% and nitrous oxides (NOx) up to 17%. Restores power and performance. Reduces the need for costly higher octane fuel. (API)

Untreated Fuel Leads to Poor Engine Performance
A vehicle demonstrates its best efficiency and engine performance when it is new. As the engine ages, its performance suffers from gasoline fuel-generated deposits that form on the fuel injectors, intake valves and combustion chamber. Additives are required to control deposit formation.

Today’s fuels, however, lack sufficient treatments of either enough additives or high quality additives. Fuel system deposits result in the following:

  • Lost fuel economy
  • Lost power and poor throttle response
  • Failed emission tests
  • Poor drivability - surging, hesitation, stalling, rough idle
  • Engine knocking (pinging) and rap
  • Difficult starts

Treated Fuel Delivers Maximum Performance
AMSOIL P.i. is the most potent gasoline additive available today. As a concentrated detergent, it is unsurpassed in cleaning combustion chamber deposits, intake valve deposits and port fuel injector deposits. AMSOIL P.i. helps maintain peak engine efficiency, fuel economy, power and drivability in newer low mileage engines. In engines with accumulated deposits, testing showed AMSOIL P.i. provided the following clean-up benefits after only one tank of gasoline:

  • Improves fuel mileage an average of 2.3% and up to 5.7%
  • Reduced emissions
    • hydrocarbons (HC) up to 15%
    • carbon monoxide (CO) up to 26%
    • nitrous oxides (NOx) up to 17%
  • Restored power and performance
  • Reduced need for costly higher octane fuel
  • Reduced noise from carbon rap and pre-ignition
  • Better drivability
  • Smoother operation

AMSOIL P.i. works as an “emissions passer.” It is ideal for use prior to emissions inspections.

Unsurpassed Deposit Clean-up
Port Fuel Injector Deposits form after the engine has been shut down and there is no gasoline flowing through the injectors. During this “hot soak” period the injectors heat up and the gasoline remaining in the injectors degrades and forms deposits. This can happen very quickly with the use of poor quality gasoline and short trip driving. Because the clearances within the injectors are extremely tight and injectors must deliver precise amounts of “atomized” fuel, even small amounts of deposits can cause injectors to malfunction. Fuel flow is reduced and spray patterns are disrupted, decreasing engine efficiency, power and fuel economy, while increasing exhaust emissions.

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Intake Valve Deposits form on the intake side or back side of the valves. As deposits increase, they restrict airflow and alter airflow patterns in the cylinder. The deposits disrupt the balanced air/fuel ratio by momentarily absorbing and releasing fuel, and they can cause valve sticking by getting in the way of the valve stem and guide. Deposits also restrict proper seating, and the valves may be burned. Intake valve deposits cause lost engine power, increased emissions, poor engine efficiency and potential valve failure.

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Combustion Chamber Deposits form on the top of the pistons and on the cylinder heads. They increase compression and absorb heat during combustion to later release it during the intake cycle. In some engines with tight squish domes, combustion chamber deposits cause the piston to actually hit the cylinder head. This is referred to as combustion chamber deposit interference or “carbon rap.” Combustion chamber deposits also flake off as they get large, and these flakes can get trapped between the valves and valve seat, resulting in compression loss, difficult starting and rough idle.

Higher compression and stored heat cause increased intake fresh charge temperatures and the increased likelihood of pre-ignition “knock” or “pinging” when the fuel spontaneously combusts prior to spark ignition. This increases emissions and may cause engine damage. Many of today’s cars have “knock” sensors that adjust spark timing to prevent knock.

Although audible knock is controlled, power is lost from retarded timing. Higher octane fuels of 4-5 octane numbers can be used to help prevent knock, an effect called “octane requirement increase.”As a vehicle ages, more-expensive,
higher-octane fuel is needed to keep it operating at peak performance. By cleaning combustion chamber deposits, knock is controlled, power is restored, fuel economy increases and higher-octane fuels are less necessary for peak performance.

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Maximum Fuel Economy
AMSOIL P.i. maximizes fuel efficiency by dissolving and removing fuel system deposits and other contaminants for improved power and overall performance.

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Recommendations
Treat one full tank of gas up to 20 gallons with one bottle of P.i. For very large gas tanks, partially fill to 40 gallons and treat with two bottles of P.i. Using more than two bottles per treatment is not recommended. Treat gas every 4,000 miles of service (or 100 hours for marine, stationary and off-road gasoline-powered engines). P.i. helps pass emission tests by running one tank of treated fuel through the engine prior to testing. Safe for use with catalytic converters, oxygen sensors, oxygenated gas and 10 percent ethanol blended gas. Not recommended for two-cycle engines.

DANGER: Combustible. Harmful or fatal if swallowed. Harmful if inhaled. Skin and eye irritant. Read precautions on container before use.

API Package Sizes
Code Package Size Unit of Measure Product
APICN (APICN-EA) 12-Oz. Each P.i. Performance Improver Gasoline Additive
APICN (APICN-CA) 12-Oz. Case of 12 P.i. Performance Improver Gasoline Additive
More about AMSOIL Reviews

REVIEW SNAPSHOT®

by PowerReviews
AMSOILP.i. Performance Improver Gasoline Additive
 
4.9

(based on 103 reviews)

Ratings Distribution

  • 5 Stars

     

    (93)

  • 4 Stars

     

    (8)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (1)

96%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

Awesome Fuel System Tx.!

I utilize the additive about once q. 3 mo. and I can definitely tell the difference in my wife's '08 Honda Accord 3.5L V-6. The MPG increases on HWY by about...Read complete review

I utilize the additive about once q. 3 mo. and I can definitely tell the difference in my wife's '08 Honda Accord 3.5L V-6. The MPG increases on HWY by about 5%! Amsoil should come out with an affordable Ethanol Tx. which counteracts the decrease in MPG/Power of ethanol blend gasoline. We strictly utilize BP gasolines, yet there is still carbon build-up even with the additives they possess. Definitely worth the price to help keep the fuel system flowing smoothly!

VS

Most Liked Negative Review

 

Not convinced it did anything

Put it in gas as per directions, drove it around in my 2012 work van, 140,000km. Normal average consumption is 11.8 to 12.4L/100km, and I fell in that range for the treatment...Read complete review

Put it in gas as per directions, drove it around in my 2012 work van, 140,000km. Normal average consumption is 11.8 to 12.4L/100km, and I fell in that range for the treatment tank, and the following tank. Can't say if it cleaned anything out, but I can say it didn't help mileage.

Reviewed by 103 customers

Displaying reviews 1-10

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5.0

Amazing, just like everything at Amsoil.

By 

from Atlanta

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I use this product religiously to keep my fuel system on my 2005 Ford F-150, in the best shape I can.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2005 Ford F-150
 
5.0

Yes I would buy it again

By 

from Williston Vermont

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I used it in the gas tank of my Volvo XC70 to help the engine run smoother, it sounded like water might be their, It works great.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • F-350.diesel w/6.7;Cars,tractors,atvs.
 
5.0

Highest quality of products.

By 

from Gardnerville, NV

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I recommend Amsoil to anyone that wishes to take the best care of their vehicles. All that have tried the products, are completely satisfied, & they have said no other brand of products would be used in the future. Only Amsoil!

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2003 Ram 3500 Cummings
 
5.0

I would buy this again

By 

from Coos Bay, Oregon

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Works great

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Jeep, Audi & a truck
 
5.0

insurance

By 

from Madoc, Ontario

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I have used PI twice a year since the car was new and at 240,000 kilometers it idles smooth and has the same driving feel as new. I call that insurance.

  • How would you describe yourself?:
  • I'm a full-on gearhead
 
5.0

Will buy product again

By 

from Port Angeles, WA

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Use in all my gas powered equipment

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • several
 
5.0

PI Performance

By 

from Waynesboro ms.

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

PI Performance works great added horse power and increase fuel millage.

  • How would you describe yourself?:
  • I'm a professional mechanic
  • What kind of vehicle/equipment do you have?:
  • 2010 Toyota Tundra
 
5.0

Best products on the market

By 

from Central, FL

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I use all Amsoil products in both of my vehicles and have for years now. I will not use anything else in any of my vehicles.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Passenger car and pickup truck
 
5.0

VERY GOOD

By 

from BERNE INDIANA

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

IN CAR, TRUCK, MOWERS

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • TRUCKS AND PULLING TRACTORS
 
5.0

Great product!

By 

from Chico Ca

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Improved my gas mileage & performance overall better running engine for sure

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 08 Dyna Street Bob FXDB

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