The AMSOIL Advantage for MotoX equipment
"I couldn't be happier with the AMSOIL products. I feel like I
have an edge over the competition when it comes to performance and
durability, and that's a great feeling when the going gets tough.
Our race program uses most everything in the AMSOIL
Line."
- Mike LaRoccoTwo-Time
National Supercross Champion2000
World Supercross Champion2002
US Open Supercross Champion
New AMSOIL "Fabulous Four" 2-Cycle Oils provide second-to-none
protection and performance in modern two-cycle equipment
Two-cycle engines remain the workhorses in recreational equipment,
including outboard motors, motorcycles, snowmobiles and personal
watercraft, as well as in lawn and garden applications like lawn
mowers and weed eaters. Design changes over recent years have
included direct fuel injection engines, in which fuel is injected
directly into the combustion chamber, and exhaust power valves,
which improve combustion efficiency at varying RPM. These design
changes have allowed two-cycle engine manufacturers to effectively
reduce emissions, improve fuel efficiency and decrease oil
consumption. Today's two-cycle motors of all types require
specialized oil technology to deliver maximum engine protection,
dependable operation and long service life.
As the leader in two-cycle oil technology, AMSOIL has performed
extensive research in developing a new line of revolutionary,
specialized oils called the "Fabulous Four." AMSOIL INTERCEPTOR
Synthetic 2-Cycle Oil (AIT) was the first new oil to be introduced.
It is primarily recommended as an injector oil or at a 50:1 mix
ratio in carbureted, electronic fuel injected (EFI) and direct fuel
injected (DFI) snowmobiles, personal watercraft, motorcycles and
ATV's. Formulated with wax-free premium quality synthetic esters
and a specialized additive package,
INTERCEPTOR is
designed to address the exhaust valve sticking problems associated
with certain snowmobile models.
New AMSOIL
HP Injector Synthetic 2-Cycle Oil (HPI),
DOMINATOR
Synthetic 2-Cycle Racing Oil (TDR)
and
Saber Professional (ATP)
and
Outboard (ATO)
Synthetic 100:1 Pre-Mix 2-Cycle
Oils complete the Fabulous Four lineup, replacing AMSOIL Synthetic
2-Cycle Injector Oil, Series 2000 Synthetic 2-Cycle Racing Oil and
100:1 Pre-Mix Synthetic 2-Cycle Oil, respectively. The application
chart below ranks each oil's performance in common two-cycle
applications.
AMSOIL
Synthetic 2-Cycle Oils
Reduce
friction and wear, improve throttle response and deliver
maximum power. Clean-burning ashless formulations prevent
plug fouling and carbon deposits. Deliver quick, dependable starts.
Reduce smoke and emissions and won't "load up" during prolonged
idling. Provide outstanding cold temperature flow. Contain
special anti-rust agents for off-season storage.
AMSOIL
Synthetic 2-Cycle Oils are superior quality lubricants which
provide maximum protection and outstanding performance in all
two-cycle gasoline engines.
Maximum
Wear
Protection
AMSOIL Synthetic 2-Cycle Oils are high film strength oils that
virtually eliminate metal to metal contact so piston scuffing is
prevented and wear is reduced. The high lubricate of AMSOIL
Synthetic 2-Cycle Oils reduces friction so operating
temperatures are controlled and maximum engine performance is
achieved.
Reduced
Engine Deposits
AMSOIL
Synthetic 2-Cycle Oils contain top performing additives which
have been tested and proven to minimize high temperature
deposits. These oils resist oil breakdown from heat so they do not
form gum, varnish, sludge or sticky deposits. Spark plug fouling
and excessive carbon build-up in the combustion chamber, exhaust
port and ring area are greatly reduced. In addition, the clean burn
characteristics and lean mix ratios reduce smoke and exhaust
emissions.
Prevents
Rust and Corrosion
AMSOIL Synthetic 2-Cycle Oils contain special rust and corrosion
inhibitors, providing excellent off-season storage
protection.
Outstanding
Low Temperature Performance
Both AMSOIL Synthetic Injector Oil and 100:1 Pre-mix Oil mix
readily with fuel even in low temperatures. However, AMSOIL
Injector Oil with its -45°F
pour point and SAE #4 miscibility and fluidity rating, is
better suited for severe cold. It is recommended for use in
injector systems as well as 50:1 pre-mix. Also, AMSOIL injector oil
will help ease starting because it does not solidify or get gummy
in the motor which allows it to turn over more freely.
NEW!
AMSOIL
Interceptor High PerformanceSynthetic
2-Cycle Oil
Eliminates
hard carbon deposits in ring grooves, piston skirts and exhaust
power valves.
Extends
engine life by reducing wear on cylinders, pistons and
bearings.
Reduces
smoke and odor with two-cycle engines
Prevents
plug fouling.
Provides
exceptional SAE #4 cold temperature fluidity (-54°) pour
point).
Protects
against rust.
Prevents
pre-detonation by eliminating "hot spots."
Recommended
for Applications Requiring the Following
Specifications:
API
TC, JASO FC.
Product
Code: AIT
| Two-cycle motors deliver one power impulse for each revolution of the crankshaft. |
The terms "two-cycle" and "two-stroke" are often inter-changed when speaking about two-cycle engines. These engines derive their name from the amount of directional changes that the pistons make during each power stroke. Internal combustion engines are used to produce mechanical power from the chemical energy contained in hydrocarbon fuels. The power-producing part of the motor's operating cycle starts inside the motor's cylinders with a compression process. Following this compression, the burning of the fuel-air mixture then releases the fuel's chemical energy and produces high-temperature, high-pressure combustion products. These gases then expand within each cylinder and transfer work to the piston. Thus, as the engine is operated continuously, mechanical power is produced. Each upward or downward movement of the piston is called a stroke. There are two commonly used internal combustion engine cycles: the two-stroke cycle and the four-stroke cycle.
| A four-cycle engine requires four strokes of the piston (two up and two down) and two revolutions of the crankshaft to complete one combustion cycle and provide one power impulse. |
The fundamental difference between two-cycle engines and four-cycle engines is in their gas exchange process, or more simply, the removal of the burned gases at the end of each expansion process and the induction of a fresh mixture for the next cycle. The two-cycle engine has an expansion, or power stroke, in each cylinder during each revolution of the crankshaft. The exhaust and the charging processes occur simultaneously as the piston moves through its lowest or bottom center position.
In a four-cycle engine, the burned gasses are first displaced by the piston during an upward stroke, and then a fresh charge enters the cylinder during the following downward stroke. This means that four-cycle engines require two complete turns of the crankshaft to make a power stroke, versus the single turn necessary in a two-cycle engine. In other words, two-cycle engines operate on 360 degrees of crankshaft rotation, whereas four-cycle engines operate on 720 degrees of crankshaft rotation.
Where are two-cycle engines used?
Two-cycle engines are inexpensive to build and operate when compared to four-cycle engines. They are lighter in weight and they can also produce a higher power-to-weight ratio. For these reasons, two-cycle engines are very useful in applications such as chainsaws, Weedeaters, outboards, lawnmowers and motorcycles, to name just a few. Two-cycle engines are also easier to start in cold temperatures. Part of this may be due to their design and the lack of an oil sump. This is a reason why these engines are also commonly used in snowmobiles and snow blowers.
Some advantages and disadvantages of two-cycle engines
Because two-cycle engines can effectively double the number of power strokes per unit time when compared to four-cycle engines, power output is increased. However, it does not increase by a factor of two. The outputs of two-cycle engines range from only 20 to 60 percent above those of equivalent-size four-cycle units. This lower than expected increase is a result of the poorer than ideal charging efficiency, or in other words, incomplete filling of the cylinder volume with fresh fuel and air. There is also a major disadvantage in this power transfer scenario. The higher frequency of combustion events in the two-cycle engine results in higher average heat transfer rates from the hot burned gases to the motor's combustion chamber walls. Higher temperatures and higher thermal stresses in the cylinder head (especially on the piston crown) result. Traditional two-cycle engines are also not highly efficient because a scavenging effect allows up to 30 percent of the unburned fuel/oil mixture into the exhaust. In addition, a portion of the exhaust gas remains in the combustion chamber during the cycle. These inefficiencies contribute to the power loss when compared to four-cycle engines and explains why two-cycle engines can achieve only up to 60 percent more power.
How are two-cycle engines lubricated?
Two-cycle motors are considered total-loss type lubricating systems. Because the crankcase is part of the intake process, it cannot act as an oil sump as is found on four-cycle engines. Lubricating traditional two-cycle engines is done by mixing the oil with the fuel. The oil is burned upon combustion of the air/fuel mixture. Direct Injection engines are different because the fuel is directly injected into the combustion chamber while the oil is injected directly into the crankcase. This process is efficient because the fuel is injected after the exhaust port closes, and therefore more complete combustion of fuel occurs and more power is developed. Direct injection engines have a higher power density than traditional two-cycle engines. Because the oil is directly injected into the crankcase, less oil is necessary and lower oil consumption results (80:1 range). Direct Injection motors have higher combustion temperatures, often up to 120°F. They also require more lubricity than traditional two-cycle motors.
- HP Injector Synthetic
2-Cycle Oil
- Interceptor Synthetic
2-Cycle Oil
- Dominator Synthetic
2-Cycle Racing Oil
- Saber Synthetic 100:1 Pre-Mix
2-Cycle Oil
