|
Amsoil PI
Performance Improver Gasoline Additive
Today’s fuels vary in quality and additive treat levels from
the refinery. Although a certain level of detergent additive is
required by law to be formulated into gasoline, cost restrictions
cause refineries to use low quality additives in the
lowest additive concentration (LAC), a level insufficient to
prevent deposit accumulation. Deposits accumulate on
fuel injectors, intake valves and combustion chambers
within just a few thousand miles, disrupting spray patterns,
affecting electronic sensors and causing a multitude of
problems.
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
The newly formulated AMSOIL PI
Performance Improver 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, eliminating the
need for expensive fuel injector cleaning procedures.
It is ideal for use prior to emissions
inspections, and it 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
The new PI formulation offers greater potency than the
old formulation and delivers extra benefits, including
increased fuel economy improvements, improved intake
valve and combustion chamber cleaning and lower emissions.
Because it is recommended every 4,000 miles, rather
than with every tank of gas, the new PI formulation is also
more convenient to use. Its new smaller neck makes it
easier to pour into the tank, and because the flip top has
been eliminated, leakage is minimized.
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 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.
Although the new PI formulation costs slightly more per
bottle than the old formulation, its more powerful potency
saves money in the long run. For example, in a vehicle with
a 20-gallon tank receiving 20 miles per gallon, the new PI
costs 15% less over the course of 4,000 miles. The old PI
formulation treated fuel at a rate of one oz. per 10 gallons
of gasoline. A vehicle receiving 20 mpg consumes 200 gallons
of gas and 20 ounces of the old PI over 4,000 miles,
equating to a $7.50 Dealer cost or a $9.81 suggested retail
cost for the 20 ounces of PI necessary for 4,000 miles
($6.00 Dealer/$7.85 suggested retail per 16-oz. bottle when
purchased by the case). Similarly, only one 12-oz. bottle of
new PI is recommended per 4,000 miles of driving, equating
to a Dealer cost of $6.50 and a suggested retail cost of
$8.60 when purchased by the case. Additionally, old PI
required an initial clean-up dose of six ounces per 10 gallons
of gas, further increasing its cost. Owners of vehicles
receiving less than 20 mpg save even more by using the new
PI formulation.
PI Product Improvements
• Unsurpassed combustion chamber clean-up
• Increased fuel economy improvement
• More powerful cleaning agents for better overall
performance
New 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. 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.
Ideally, PI should be poured into the tank prior to filling it with
gas, but it will also mix thoroughly when added after fill-up
through normal agitation from driving. |
