 P.i. Performance Improver Concentrate
(API)
AMSOIL P.i. improves 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 Pricing Information or Place an
Order
Package sizes include:
12-oz. Bottle
12-oz. Bottles (case of 12)
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.
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.
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 P.i. maximizes fuel efficiency by dissolving and
removing fuel system deposits and other contaminants for
improved power and overall performance.
Recommendations
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. P.i. 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.
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