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
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REVIEW SNAPSHOT®

by PowerReviews
AMSOILP.i. Performance Improver Gasoline Additive
 
4.9

(based on 154 reviews)

Ratings Distribution

  • 5 Stars

     

    (143)

  • 4 Stars

     

    (8)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (1)

98%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

The name says it all!

The name says it all, "Performance Improver Gasoline Additive"! It does exactly as the name says, it has improved the power and responsiveness of all my vehicles and toys and improves...Read complete review

The name says it all, "Performance Improver Gasoline Additive"! It does exactly as the name says, it has improved the power and responsiveness of all my vehicles and toys and improves mileage as well. I got the second best mileage that I ever gotten in my Tacoma truck after adding a full bottle to a tank of gas. And that's despite driving 10-15 km/hr. faster than I normally drive with a 40-50 km/hr. head wind over a 5 hr driving period. The only time I got better mileage was with a 60 km/hr. tail wind and driving 25 km/hr. slower.

VS

Most Liked Negative Review

 

Just cheap insurance for fuel system

I am not sure if the product actually does much to improve the fuel mileage of my 6 cylinder Chrysler 200 but it does seem to run smoothly . I just use it when I...Read complete review

I am not sure if the product actually does much to improve the fuel mileage of my 6 cylinder Chrysler 200 but it does seem to run smoothly . I just use it when I change my oil and filter to help keep the fuel injection system clean. I figure if I'm gonna put in clean oil.and filter, might as well clean fuel system too!

Reviewed by 154 customers

Displaying reviews 1-10

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5.0

Works awesome

By 

from Rome new york

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Put this in all of my cars and they got better gas millage.i recommend this product to all of my friends

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • Foreign cars diesel trucks and ag
 
5.0

I buy PI by the case

By 

from VA

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Great product and gives your vehicle a clean out and a mileage boost.

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • Stepvan, cars, pickup
 
5.0

WOW!

By 

from Florida

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I used this on a company car that only drove short distances around the work site (Orlando Airport). I used this product on my personal car and liked the results so I used it in this company car and WOW!!! The results were phenomenal. No more rough starts. No acceleration lag. It was like a totally new car.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • '13 F-150
 
5.0

Definitely worth every penny.

By 

from Tampa, Fl

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I use this product every other month and it keeps all my vehicles running great.

  • How would you describe yourself?:
  • I'm a professional mechanic
  • What kind of vehicle/equipment do you have?:
  • 2007 GT500, 1985 Ford Bronco, 2008 CBR
 
5.0

I would recommend this product, no questions asked!!

By 

from Strasburg, Va.

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I use this product to keep the fuel injectors in my Honda Fit clean. It seems to improve the fuel mileage and restores the power that is lost because of the poor quality fuel on the market today.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Honda Fit, Cub Cadet mower, push mower.
 
5.0

I USE THIS AT EVERY OIL CHANGE

By 

from CHICAGO

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

WORKS GOOD, ALL MY TRUCKS RUN FINE. PUSHING 248k MILES ON MY '98 CHEVY. TRY QUICKSHOT FOR YOUR SMALL ENGINES, PUT IT IN THE GAS CAN WHEN YOU FILL UP, REALLY CLEANS UP LAWN MOWERS AND CHAINS SAWS, THEY RUN SO NICE.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • MOTOR VEHICLES, LAWN CARE STUFF
 
5.0

I would buy this product again and again

By 

from UT

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I put Amsoil in everything I own. I found that my vehicles and equipment last longer and perform better. My vehicles gfet better MPG, and handle all kinds of wear and tear.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • F150, dodge caravan, Honda lawnmower
 
5.0

Great Product

By 

from Boca Raton, FL

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Excellent

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

Can I drink this and operate better?

By 

from Seattle, WA

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Wifey left her flagship Mercedes Benz unused for a long time and the engine was really rough. I poured in 2 oz per tank until the idle was smooth. I recommend putting a little in at a time in case injectors get plugged with a whole bottle. So start slow for the first tank and then increase. Lovely stuff.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • Cars, trucks
 
5.0

Have Before And Will Buy Again

By 

from Denver,Co.

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Great Product,Probably The Best.Wish AMSOIL Cut One A Break On Shipping!

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • '92 Saab 9000 Turbo

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