AMSOIL P.i. Performance Improver Gasoline Additive
NEW AMSOIL Preferred Customer Program

P.i. Performance Improver Gasoline AdditiveHelp

P.i. Performance Improver Gasoline Additive Product Image
Click image to enlarge
$13.45 Retail Price (USD)
QTY:
Product Code: APICN-EA
Product Highlights View Full Description

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.

Click for larger view

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.

Click for larger view

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.

Click for larger view

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.

Click for larger view

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 116 reviews)

Ratings Distribution

  • 5 Stars

     

    (106)

  • 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 116 customers

Displaying reviews 1-10

Back to top

Previous | Next »

 
5.0

Clean up

By 

from TX

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Gas was slightly contaminated AMSoil straightened it all out.

  • How would you describe yourself?:
  • I love my vehicles / toys
 
5.0

I buy this product with every oil purchase

By 

from Metamora, MI

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I put this product in everything from my lawnmower equipment to my motorcycle to my turbo daily driver. I can see the improvement in fuel economy and the engines just run smoother. Also my lawn equipment's fuel system doesn't seem to get gummed up as often.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 2016 Malibu Premier/ Craftsman Equipment
 
5.0

It's the best

By 

from Wichita

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I can tell a huge difference in my cars . Most other products I can not. I love Amsoil products!

  • How would you describe yourself?:
  • I love my vehicles / toys
 
5.0

Great product

By 

from Colorado

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Great product love the performance and protection I getting from additive

  • How would you describe yourself?:
  • I'm a professional mechanic
  • What kind of vehicle/equipment do you have?:
  • 2012 Wrx
 
5.0

Simply maintenance cues

By 

from Florence, TX

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I looked forward to using this product every 4500 miles in other to help maintain a clear and clogged free fuel line and filter system.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • 2008 Acura TL Type-S (3.5L)
 
5.0

Loved the product

By 

from Orlando, FL

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I purchased this product for my 2010 Honda Accord with the 3.5L VTECH engine on it. It is my daily driver and work vehicle. I do not not exactly what's my MPG's since the vehicle does not have the feature but I can tell you that I am using one quart of gas when before I was using half tank of gas in one week period just going and coming back from work. Also it is city driving. Loved the product.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 1 SUV and 2 cars/sedan
 
5.0

50/50

By 

from Ormond Beach, Fl

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Satisfied with the purchase, but since I do a lot of city driving and fuel up every 2 days, not really sure if I improved my mileage.

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • RAM 1500 V85.7L, Toro SS5000 Z-turn,
 
5.0

I would buy this product again.

By 

from Tampa, FL

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

I tried this product just this one time on a trip. I give it five stars because I was satisfied with it although I would need more time to fully test it.

  • How would you describe yourself?:
  • I love my vehicles / toys
 
5.0

Extremely pleased with the noticeable results!

By 

from Puyallup, WA

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Used this priduct to clean fuel system on our Nissan Rogue. Instead of just 28mph, we now get 33mph.

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

(1 of 1 customers found this review helpful)

 
5.0

This is a worthwhile part of maintenance for your engine

By 

from Vancouver, Canada

Verified Buyer

Comments about P.i. Performance Improver Gasoline Additive:

Whenever I'm off on a long trip I use this product and am now close to 200,000 kilometres and 10 years of use without any engine problems at all. My Toyota Tundra pickup is running like new.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2006 Toyota Tundra

Displaying reviews 1-10

Back to top

Previous | Next »