AMSOIL P.I. Performance Improver Gasoline Additive

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AMSOIL P.i. Performance Improver Gasoline Additive

P.I. Performance Improver Concentrate (API)
AMSOIL PI improved fuel economy by reducing port fuel injector deposits, intake valve deposits and combustion chamber deposits in 100% of the vehicles tested!

Reformulated for greater potency

See Retail Pricing Information OR Place An Order

Package sizes include:

16-oz. Bottle
16-oz. Bottles (case of 12)
1-Gallon Bottle
1-Gallon Bottles (case of 4)
55-Gallon Drum

For Small Engines and Powersports Equipment try NEW (P.I. Quickshot)

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.

Injector Clean-up

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.

Intake Valve Deposits

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.

Deposit Comparison

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.

Mileage Improvement

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.


AMSOIL MOTOR OILS (10,000 miles / 6-month drain intervals)

AMSOIL Synthetic 5W-30 Motor Oil (10,000 miles/6-month drain intervals)
AMSOIL Synthetic 10W-30 Motor Oil (10,000 miles/6-month drain intervals)
AMSOIL Synthetic 5W-20 Motor Oil (10,000 miles/6-month drain intervals)
AMSOIL Synthetic 10W-40 Motor Oil (10,000 miles/6-month drain intervals)

AMSOIL MOTOR OILS (15,000 - 25,000 miles 1-year drain intervals)

AMSOIL Signature Series 0W-30 100% Synthetic Motor Oil (25,000 1-year drain intervals) *NEW*
AMSOIL SAE 0W-20 Synthetic Motor Oil (25,000 miles 1 year drain intervals) *NEW*
AMSOIL SAE 5W-30 Synthetic Motor Oil (25,000 miles 1 year drain intervals)
AMSOIL SAE 10W-30 Synthetic Motor Oil (25,000 miles 1 year drain intervals
AMSOIL SAE 10W-40 Synthetic High Performance Motor Oil 25,000 miles 1-year drain intervals)
AMSOIL SAE 20W-50 Synthetic Higmh Performance Motor Oil 25,000 miles 1-year drain intervals)


AMSOIL Synthetic 5W-40 Premium Diesel Oil *NEW*
AMSOIL SAE 15W-40 Synthetic Heavy Duty Diesel and Marine Motor Oil
AMSOIL SAE 60 Synthetic Heavy Racing Oil
AMSOIL SAE 30 Synthetic Diesel Oil
Diesel Concentrate Plus Cold Flow Improver *NEW*

Diesel Concentrate
Diesel Cold Flow Improver
Cetane Boost Diesel Fuel Additive

AMSOIL SAE 10W-30 Synthetic Motorcycle Oil *NEW*

AMSOIL SAE 10W-40 Synthetic Motorcycle Oil
AMSOIL SAE 20W-50 Synthetic Motorcycle Oil
AMSOIL SAE 20W-40 Synthetic Natural Gas Engine Oil, Low Ash



AMSOIL SAE 60 Synthetic Heavy Racing Oil

AMSOIL Absolute Efficiency Oil Filters
AMSOIL Absolute Efficiency Air Filters
AMSOIL EaAR Air Filters
AMSOIL Air Pre-Filters *NEW*
AMSOIL EA Universal Air Induction Filters
AMSOIL EA Motorycle Air Filters
AMSOIL EA Motorycle Oil Filters
PCIS73 7.3L Power Stroke Air Induction System
WIX Filters
Donaldson Endurance Air Filters
Donaldson Endurance Oil Filters
Donaldson TopSpin Air Filter Pre-cleaner
AMSOIL By-Pass Oil Filters
EaBP Bypass Filters
AMS-Oiler ™ Oil Precharger


AMSOIL Synthetic Automatic Transmission Fluid
AMSOIL Synthetic Powershift Transmission Fluids
AMSOIL Synthetic Supershift Racing Transmission Fluid
AMSOIL Synthetic Synchromesh Transmission Fluid
AMSOIL Synthetic Manual Transmission and Transaxle Gear Lube
AMSOIL Torque-Drive Synthetic ATF
AMSOIL Synthetic Tractor Hydraulic/Transmission Oil

AMSOIL Interceptor Synthetic 2-Cycle Oil
AMSOIL HP Injector Oil
Saber Professional 100:1 Pre-Mix
Saber Outboard 100:1 Pre-Mix

AMSOIL SAE 10W-40 Formula 4-Stroke ® Marine Synthetic Motor Oil
AMSOIL SAE 10W-30 Formula 4-Stroke ® Marine Synthetic Motor Oil
AMSOIL SAE 15W-40 Synthetic Heavy Duty Diesel and Marine Motor Oil

AMSOIL SAE 0W-40 Formula 4-Stroke Synthetic Motor Oil
AMSOIL Formula 4-Stroke ® 10W-30/SAE 30 Synthetic Small Engine Oil
AMSOIL Formula 4-Stroke 10W-40 Synthetic Scooter Oil *NEW*

AMSOIL SEVERE GEAR ™ SAE 190 Gear Lubricant
AMSOIL SEVERE GEAR ™ SAE 250 Gear Lubricant
AMSOIL SEVERE GEAR ™ Synthetic Extreme Pressure 75W-140 Lubricant
AMSOIL SEVERE GEAR ™ Synthetic Extreme Pressure 75W-90 Lubricant
AMSOIL SEVERE GEAR ™ Synthetic Extreme Pressure 75W-110 Lubricant *NEW*
AMSOIL Long Life Synthetic 75W-90 Gear Lube
AMSOIL Long Life Synthetic 80W-140 Gear Lube
AMSOIL SAE 80W-90 Synthetic Gear Lube, GL-5, MT-1
AMSOIL SAE 75W/80W-90 Universal Synthetic Marine Gear Lube
Slip Lock Differential Additive

Series 500 High-Performance DOT 3
Series 600 High-Performance DOT 4 Racing


AMSOIL Propylene Glycol Antifreeze and Engine Coolant

AP.I. Performance Improver Gasoline Additive
Gasoline Stabilizer
Series 2000 Octane Boost
Power Foam Engine Cleaner & Degreaser

Engine and Transmission Flush

AMSOIL SAE 20W-40 Synthetic Natural Gas Engine Oil, Low Ash
AMSOIL Power Steering Fluid *NEW*
Oil Analysis Kits
AMSOIL Engine Fogging Oil *NEW*
MP Metal Protector
MP Heavy Duty Metal Protector

Miracle Wash Waterless Wash and Polish

Synthetic Sirocco ® SE Series Compressor Oil
Synthetic PC-Series Compressor Oil
Synthetic Anti-Wear Hydraulic Oils
Synthetic Thermally Stable Biodegradable Hydraulic Oil
Synthetic Tractor Hydraulic/Transmission Fluid

Series 2000 Synthetic Racing Grease
Synthetic Heavy-Duty Greases
Synthetic Multi-Purpose Greases
Synthetic Multi-Purpose Spray Grease
Synthetic Water Resistant Grease
Semi-Fluid 00 Synthetic EP Grease
Synthetic High Viscosity Lithium Complex Grease
Synthetic Fifth Wheel and Open Gear Compound
Synthetic X-Treme Aluminum Complex Food Grade Grease (USDA H-1)
Synthetic Blend Bar and Chain Oil
Synthetic Heavy-Duty Grease
Series 2000 Synthetic Chaincase Lubricant

Shock Therapy Suspension Fluid #5 Light

AMSOIL Hand Pump


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