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AMSOIL Gasoline Performance Improver

Increase miles per gallon, solve and prevent fuel related problems with AMSOIL PI

Fuel standards don't require gasoline distributors to add more the 1980 standard amount of injector cleaner to fuel. Henceforth, injector performance degrades adding a potential loss of 2 to 8% in economy within just 4000 miles.

Check out our new radio commercial on this great product "AMSOIL PI - Gas Savings". Produced June 21st 2013. (MP3).

AMSOIL P.I. (product code API) will restore your intake system to like new condition. As few as 4000 miles all it takes to have clogged injectors or significant carbon build-up on your intake valves. Please continue reading and see the presentation link below:

(For diesel please visit our diesel fuel additive page)

Download and share this comprehensive study regarding AMSOIL's PI (859K).

Save gas - it's guaranteed. Have you seen intake valves after just 40,000 mies? This will better the flow and allow for more even ise of injectors. If you loose an injector the oxygen sensor compensates further sdding to the problem.In addition to the savings in fuel AMSOIL's synthetic motor and drivetrain lubricants have become legendary for, AMSOIL's P.I. Performance Improver Gasoline Additive adds even more economy for less!

Ideal for both fuel injected and carbureted systems. Dissolves and removes fuel system deposits and other contaminants for improved power, overall performance and fuel efficiency in gasoline engines.

Buy AMSOIL Performance Improver In the Online Store Now.

We went ahead and added the link to the presentation: AMSOIL PI Performance Improver for Gasoline Fuel Systems. (Carbureted included)

Customers who used AMSOIL PI also bought AMSOIL Power Foam Intake and Engine Degreaser

Available in the following sizes:

16-oz. Bottles
12 bottle case
1-Gallon Bottle
4-Gallon Case
55-Gallon Drum

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 PI 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 PI helps maintain peak engine efficiency, fuel economy, power and drivability in newer low mileage engines. In engines with accumulated deposits, testing showed AMSOIL PI 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

Buy AMSOIL Performance Improver In the Online Store Now.

AMSOIL PI 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.

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.

Image taken from data sheet - sorry for the grainy image. We mail these in our packets.

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.

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

Treat one full tank of gas every 4,000 miles or 100 hours of service. One bottle treats 20 gallons of gas. Do not treat and run more than 40 gallons of gas per treatment. PI helps pass emissions tests. Treat gas, run that tank and fill up again prior to test. Safe for use with catalytic converters, oxygen sensors, oxygenated gas and 10% 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.

For Powersports, marine and small engine owners see our AMSOIL QuickShot SE product. Won the SEMA 2010 Product of the year award!


AMSOIL Dealer Dorsett Wilson is amazed AMSOIL still has surprises to offer in product performance.
He discovered one of them in the recently reformulated AMSOIL Performance Improver (API) when he traveled from Houston, Texas to AMSOIL University in Superior, Wis. this spring.
“AU was a blast as always,” Wilson said. “Just when you think ‘surely they haven’t come up with anything startlingly new,’ they do. The new PI is one of those things.”
Wilson reports averaging around 21 miles per gallon on the trip from his home in Texas to Duluth, Minn. in his 2000 Ford Ranger.“
I was not completely convinced that the new PI was as good as people were saying at AU, so I decided to check it out,” he said.
Wilson put a bottle of PI in the tank when he refueled for his trip home. Then, he tallied the mileage at each of three gas tank fills on the way back to Houston.“
On the way home, the first tank refueling took 18 gallons and was 22.1mpg, the second refueling took 19.3 gallons at 22.9 mpg and the last refueling was with 18.5 gallons at 24.01 mpg,” he said. “The best fuel mileage I had ever received before was 23.7 mpg at around 15,000 miles on the odometer.”
The drive home showed Wilson the reformulated PI lived up to what he had heard.“When I arrived in Houston, I was convinced that the PI is an excellent product,” Wilson said.

Wilson also changed his wiper blades while at AMSOIL University.“I put new Trico wiper blades on and they are really great – very quiet and really wipe clean,” he said. “They are also the easiest to put on that I have found.”


Amsoil Performance Improver with a money back guarantee!

Our own local automotive writer Ed Wallace has recently written a great article on the problems of Ethanol we though you should see. Mr. Wallace has been writing about ethanol and other fuel blends for over 13 years.

Please see Ed Wallace's great article: Ethanol: A Tragedy in 3 Acts

Also for your information please see these and contact your senator.
Study: Ethanol Production Consumes Six Units Of Energy To Produce Just One

Switch to ethanol fuel has motorcyclists yelling 'foul'

"one final setup for the public has gone unnoticed. At the Web site,, which confirms the 25% to 30% drop in mileage resulting from the use of this blended fuel, another feature lets users calculate and compare annual fuel costs using regular gasoline to costs using E85." - Ed Wallace



Dealership Opportunities

AMSOIL Dealer Opportunities in 2015 provide you with the ultimate home business opportunity with over 40 years of continuous growth to back it up. These products ARE IN DEMAND! We will help you stay on course but you can become totally financially independent if you put in the effort, Call me or one of my dealers and we would love to discuss it with you.
The big thing now is getting AMSOIL in local stores, independent lube centers and automotive shops. We have a successful method to secure local business not to mention the latest in shelving, display, free installer & retailer locator listings on the corporate site, personalized materials for the shop and free shipping for those who qualify.

AMSOIL is the auto enthusiasts hero! And increases in advertising and regional support teams are there to make it more possible for you to reach your goals as an AMSOIL dealer.

Join us every year for AMSOIL University or try the upcoming online version and get ready to tell the old boss good-bye. We can even help you open your very own Amsoil Retail Store!

AMSOIL's highest demands are in both the diesel and powersports sector. We urge you to print out our Dealer Sign-up Form or even better - call us and then read more in our Dealer Opportunities section. We may also have a team of dealers close to you so call and we will forward their information.

Industry is pointing consumers our way from every direction:

  • AMSOIL is becoming a household name. Customers are expecting to find it locally.
  • Vehicle manufacturers are installing synthetic oil into new vehicles on the production line.
  • Cars & Trucks made before 1995 need oils with more anti-wear additives and better quality detergents.
  • Drivers discovering top quality (real) synthetics do indeed increase fuel mileage.
  • New lubricant trends demanded by industry are developed well before the engine and transmission technologies hit the marketplace. This allows AMSOIL to further develop their product even further while the competition arrives late testing their product after the requirement goes live.
  • New emission systems demand oils, which can take more heat and leave fewer deposits. Currently diesel engine changes have created problems which demand more stable base stocks. We have them and you save more fuel to boot!
  • OEM Automatic Transmission Fluids are limited to light duty use. AMSOIL ATF and Low Viscosity Trans Fluid cuts temperature significantly and delivers more power to the wheels. Our transmission fluids continue to be well ahead of the industry because of AMSOIL's relationship with suppliers.
  • They are demanding better lubrication qualities from the oil to improve fuel economy.
  • Commercial vehicles Require synthetics in transmission and drivetrain parts to retain extended warranties. (And better power transfer).
  • Environmentally we can not go on disposing of the millions of gallons of oil each year that is the bi-product of 3,000 mile oil change intervals - Imagine if everyone changed their oil at say 7,500 miles instead. The used oil disposal problem would be cut by 50%. Yes 50%, not just 1 or 2% - Now consider the impact of a 25,000 and beyond oil change interval.
  • OEM fill and recommended product now from several lines such as Eric Buell Motorcycles.
  • AMSOIL is MADE in USA.

As one of the largest and fastest growing groups recognized by AMSOIL, and (we think) the most responsive, we offer the communication and tools you can use. We help the customer find you. Come visit our AMSOIL Store and see how you too can make online ordering obsolete in your area too!

Why should you join our group? We are part of one of the most successful marketing dealers who specializes in finding you customers and putting you on the right track. For me it's a full time job, and we do what it takes to help people locate you. We re-distribute significant leads to those requesting them. The dealers who are easy to locate, keep some stock and follow-up on leads are the ones who are experiencing double digit growth. Use this dealer Preferred Customer link to join or CALL so we can pair you with a dealer near you.


Call 1-800-579-0580 to order or for price.

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