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
 
4.8

(based on 94 reviews)

Ratings Distribution

  • 5 Stars

     

    (84)

  • 4 Stars

     

    (8)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (1)

95%

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 94 customers

Displaying reviews 1-10

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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
 
5.0

This product keeps my motorcycles running great

By 

from Covina Ca.

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

The vehicles now a days cost a great deal of money to own and repair so I believe using Amsoil products is good insurance to keep my vehicles running good and avoiding repair costs.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Cars, Trucks, Motorcycles.
 
5.0

Works great

By 

from Louisville, KY

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I use this product every six months. My 12.5 year old injectors were perfectly clean after inspection. I'd say it works great.

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

yes

By 

from ohio

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

It works.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Chrysler 300c
 
5.0

Name says it all

By 

from Sahuarita, AZ (just south of Tucson)

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

The Performance Improver does just that. I have used it in a Kawasaki, three Hondas, and now an Indian. I can't see it working, but I can sure feel it.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2014 Indian Chief Vintage
 
5.0

Keep a stock of this

By 

from Medicine Hat, Alberta

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I add to all of our vehicles every oil change to help keep the fuel system clean and at it's optimum.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Truck, SUV, snowmobile and small engines

(1 of 1 customers found this review helpful)

 
5.0

Awesome Fuel System Tx.!

By 

from Smithfield, NC

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

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!

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • '08 Honda Accord 3.5L V-6
 
5.0

Try it

By 

from Otsego, MN

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Makes a dramatic increase in fuel economy

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Atv. Pwc. Truck
 
5.0

PI GAS ADDTIVE

By 

from livonia michigan

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

PUT IT IN TWICE YEAR IN A FULL TANK.
AND NEVER HAD A PROBLEM STARTS GOOD
IN ANY WEATHER HOT & COLD WET OR DRY

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • ALL KINDS
 
4.0

I'll be buying all AMSOIL products from now on.

By 

from Jacksonville, NC

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I've used the products and can only hope they work as advertised and from on-line reviews. Right now the jury's still out.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Jeep, Durango & Dodge pickup

Displaying reviews 1-10

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