Best 2 cycle Snowmobile oil
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Amsoil INTERCEPTOR™ High Performance Synthetic 2-Cycle Oil
A high-performance two-cycle oil with a performance emphasis on exhaust power
valves. Excellent for all types of snowmobiles, motorcycles, personal watercraft,
ATVs and jet boats. Contains high levels of detergent additives to prevent valve
sticking. High quality replacement for manufacturer branded oils. Injector use or
50:1 premix. JASO FC, API TC
Package sizes include:
1-Quart Bottles (case of 12)
1-Gallon Bottles (case of 4)
Amsoil INTERCEPTOR™ Synthetic 2-Cycle Oil is formulated with a proprietary
blend of the finest synthetic base oils and additives available today. This unique Amsoil
Chemistry represents a breakthrough development in the field of two-cycle engine lubrication.
The backbone of Amsoil INTERCEPTOR 2-Cycle Oil is a specially developed molecularly saturated
synthetic base oil. This, combined with a robust additive package, ensures exceptional
lubricity, cleanliness and optimum clean-burning characteristics. Extensive research and
testing, including a full snowmobiling season in severe Rocky Mountain applications, has proven
that wear on cylinders, pistons and bearings is significantly reduced. And with up to 30
percent more detergency and dispersancy additives than typical two-cycle oils, Amsoil
INTERCEPTOR virtually eliminates hard carbon deposits that cause exhaust power valve sticking,
ring sticking and preignition-promoting "hot spots" in the combustion chamber.
- Helps prevents hard carbon deposits that cause exhaust power valve
sticking and ring sticking.
- Superior lubricity controls cylinder, piston and bearing
- Reduces smoke and odor aazociated with two-cycle
- Helps prevent plug fouling.
- Provides exceptional SAE #4 cold temperature fluidity (-58°F pour
- Versatile and excellent for all types of recreational
- Protects against rust.
- Helps prevent pre-detonation from combustion chamber "hot
See Article: Two-Cycle Engine Applications and Lubrication
Amsoil INTERCEPTOR Synthetic
2-Cycle Oil is formulated with a proprietary blend of the finest synthetic base oils and
additives available today. This unique Amsoil chemistry represents a breakthrough
development in the field of two-cycle engine lubrication.
The backbone of Amsoil INTERCEPTOR 2- Cycle Oil is a specially
developed molecularly saturated synthetic base oil. This, combined with a potent additive
package, ensures exceptional lubricity, cleanliness and optimum clean- burning characteristics.
Extensive research and testing, including a full snowmobiling season in severe Rocky Mountain
applications, has proven that wear on cylinders, pistons and bearings is dramatically reduced.
And with up to 30 percent more detergency and dispersancy than typical two-cycle oils, Amsoil
INTERCEPTOR virtually eliminates damaging deposits on piston skirts, ring grooves and exhaust
APPLICATIONS (2-Cycle Recommendations Chart)
Amsoil INTERCEPTOR Synthetic 2-Cycle Oil is 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, ATVs and jet boats, including, but not
limited to, those manufactured by Bombardier®, Yamaha®, Arctic Cat®, Polaris®, Kawasaki®,
Suzuki® and Honda®.
It is recommended wherever JASO FC or API TC two-cycle oils are
specified. INTERCEPTOR is a premium quality replacement for recreational equipment
manufacturers' branded two-cycle oils. It is compatible with most mineral and synthetic
two-cycle oils, however, for best performance, mixing oils should be minimized.
400,000 Miles of Severe Snowmobile Field
testing With No Deposit Buildup, Power Valve Sticking, Ring Sticking or Engine
Subjected to adverse field testing conditions in the
Rocky Mountains, including long trail rides, high RPM powder riding and steep hill climbs,
Amsoil INTERCEPTOR demonstrated superior wear protection and outstanding deposit
|No carbon deposits are detectable in the functioning
region of the exhaust power valves, resulting in "no stick" performance, continuous
valve operation and reduced maintenance.
|Pistons show no scoring, little or no wear and no heavy
deposits, and wrist pins show no discoloration from heat. In fact, the original
machine markings on the pistons are still visible.
||Cylinder head is clean with no deposits, preventing pre-ignition
TYPICAL TECHNICAL PROPERTIES
INTERCEPTOR™ Synthetic 2-Cycle Oil
Kinematic Viscosity @ 100°C, cSt (ASTM
Kinematic Viscosity @ 40°C, cSt (ASTM
Viscosity Index (ASTM D-2270)
Pour Point °C (°F) (ASTM D 97)
Flash Point °C (°F) (ASTM D 92)
Fire Point °C (°F) (ASTM D 92)
ASTM Brookfield Viscosity @ -40°C (°F)
DANGER: harmful or fatal if
swallowed. Contains synthetic lubricant and petroleum distillates. If
swallowed do not induce vomiting. Contact a physician immediately.
Keep away from fire, heat and open flame. Use with adequate
ventilation. Avoid frequent or prolonged skin contact. Flush eyes
with water for 15 minutes in case of contact. KEEP OUT OF REACH OF CHILDREN.
Subject: Two-cycle exhaust power valves
Technical Service Bulletin
To bring to light the existence and purpose of a special mechanism referred to as an exhaust power
valve used in the two-cycle industry to control the size of the exhaust port.
The need in certain two-cycle engine designs to service the exhaust power valve
When dealing with basic two-cycle engine design, the size of the exhaust port can be extremely
important. A large port tends to provide freer flow offering additional performance at higher engine speeds. Due to
loss of fresh air/ fuel charge at lower speeds however, horsepower and torque are often compromised when a larger
exhaust port is utilized. Smaller ports on the other hand, tend to offer better low speed performance which
diminishes as engine speeds increase due to their restrictive nature. The most desirable situation would be one in
which the size of the exhaust valve would change with engine speed. Smallest at low speeds with a gradual increase
in size as the engine RPMs increase.
The concept of an adjustable exhaust port size is nothing new. Variations have been around since
the 1970s and in mass production in the motorcycle industry since the early 1980s. In recent years, this type of
exhaust port has become increasingly popular within the motorcycle and snowmobile industries.
Most commonly referred to as a power valve, its operation is quite simple. Though the actual
function of the valve will vary with design, the general principle is the same. At low engine speeds, the power
valve is in a closed position, covering a portion of the exhaust port. In this position, low and lower speed
performance is maximized. As the engine reaches higher operating speeds, the valve is retracted creating a larger
exhaust port. The end result is a maximization of high-speed operation without sacrificing low end and mid-range
The movement of the valve can be controlled in several differing ways. Some designs use exhaust or
cylinder pressure to activate the valve while others use an electro/mechanical method. A third style uses a direct
cable or mechanical linkage to operate the valve. Though each design has its own benefits and disadvantages, all
suffer from a similar problem. That problem, is that they all require periodic maintenance.
With the valve being placed in the exhaust stream, it must function in an extreme environment. Not
only must it deal with high temperatures but also exposure to a constant flow of contaminates. Carbonaceous
material, un-burnt fuel and heavy oil residue can form deposits on the valve.
As the level of these deposits build, the movement of the valve will become sluggish. Eventually
the deposit level will reach a point at which the valve will stop moving. One should keep in mind that the level of
force available to activate these valves is minimal. Even moderate restriction due to deposit formation can render
the valve in-operable. In order to maintain peak performance, periodic maintenance is required. Within the
snowmobile industry, some recommend that valve maintenance (cleaning) be performed as frequently as after every 500
– 1,000 miles of operation.
Subject: Two-cycle exhaust power valves
This may seem quite frequent but in many cases it is not. The length of time however, will vary
depending on two major factors. The first is how the equipment is used. power valve equipped engines that are
subjected to extensive idle or operation at continuous low speeds tend to require more frequent service. Secondly,
the type and brand of oil used in the equipment can be a significant factor affecting the frequency of needed
service. Amsoil Interceptor synthetic two-cycle oil for instance, has demonstrated superiority in the area of
maintaining power valve cleanliness. Not only has this shown through in bench tests but also in the real world of
field demonstration. At intervals designated by the equipment manufacturer or when engine performance issues arise,
the power valves should be serviced. The actual service process will vary from one design to another hence one
should refer to the individual manufacturer servicing instructions. If you are a consumer and you have any doubt as
to how to properly service the valve, it should be left to a qualified technician. As the valve is being
disassembled, one should pay close attention to it’s ability to move within it’s housing. The valve should move
freely and with little or no resistance. If a high level of resistance is noted or the valve is frozen in place,
you can rest assured the valve was negatively effecting engine performance. Also keep in mind that if a valve has
been in use for any length of time, it will have some discoloration and deposit formation. The presence of deposits
is not of great concern. The type of deposit and the degree to which they hinder movement is more important. Hard
dry carbon is worse than soft oily deposits. In other words, do not expect the valve to appear shinny and new. When
removing or cleaning, care should be taken not to mar or scratch the surfaces of the valve. Damage to the surface
of the valve can result in restricting it’s movement once reinstalled. Residue and deposits should therefore be
removed using a non-metallic scraper and/or a cleaner such as Amsoil Power Foam. Cleaners such as this help to
diazolve residue and loosen deposits without damaging critical surfaces.
In high performance two-cycle engines, power valve maintenance will always be a concern . The use
of Amsoil Interceptor synthetic two-cycle however can dramatically reduce the need and ease of such servicing. When
servicing is required, Amsoil Power Foam can assist in providing safe and effective cleaning. The end result is
more consistent performance with less effort and cost.