AMSOIL Synthetic 2-Cycle Oil
2-cycle engines are simple and have no lubricant distribution system to
speak of. In pre-mix engines, oil is mixed right into the fuel, and in
injector systems, oil is added to the fuel and air at a rate appropriate
to conditions as the fuel and air enter the engine. In either case, the
oil is simply mixed with the fuel to lubricate the engine parts.
The reason 2-cycle engines (and 2-cycle oils) work so hard is simple:
every stroke is a power stroke. In a four-stroke engine, the piston
rises and is driven down by combustion (a power stroke), but the next
time the piston rises it simply pushes out exhaust gases. In 2-cycle
engines, exhaust gas is driven out by the incoming oil-fuel mixture as
the piston forces the mixture into the combustion chamber on each and
every stroke. These factors combine to place tremendous demands on
Burn, and Burn Cleanly:
Since 2-cycle oil is mixed with the fuel, it must also be burned with
the fuel, and burned cleanly. If you've seen the tell-tale blue smoke
coming from an outboard boat motor or motorcycle, you've seen a case
where oil isn't burning cleanly - environmental regulations, concern for
the environment and just plain common sense make that kind of scene
A more subtle danger when oil doesn't burn cleanly is what happens to
the engine itself. Deposits in a hard-working 2-cycle engine can cause
scuffing and ultimately engine failure. Even exhaust outlets can become
plugged, and when that happens, engine efficiency drops and wear
2-cycle engines run hot. But while the oil must burn cleanly at
combustion temperatures, it must not burn at the hot temperatures found
outside the combustion chamber. If a 2-cycle oil is not highly resistant
to this volatile evaporation, deposits can begin to form and cause
2-cycle oil must lubricate effectively under these severe conditions.
Failure to lubricate properly can quickly result in excessive wear and
finally engine failure.
Assist in Cooling:
2-cycle engines are either air-cooled (hotter) or water-cooled
(cooler). In either case, the lubricant must take on a major portion of
the cooling duties.
The Conventional Answers:
Conventional petroleum lubricants use bright stock, a heavy cut of
petroleum, to add lubricity and anti-scuffing properties. Unfortunately,
bright stock doesn't burn cleanly. In addition, petroleum base stocks
are more prone than synthetics to volatile evaporation, and when they
volatize, they tend to form hard carbon deposits that cause extreme
To solve the contamination problems caused by dirty-burning bright
stock, conventional 2-cycle oil manufacturers use solvents to keep
engine parts clean.
When using low-grade solvents, however, there may be drawbacks.
Low-grade solvents help with dispersions, but they can hurt film
strength and ultimately detract from lubrication performance, and
manufacturers that treat 2-cycle oil as a commodity are likely to use
bargain-basement solvents instead of the more costly ones that perform
To meet pump ability, mix ratio and low-temperature fluidity
requirements, AMSOIL 2-Cycle Injector Oil uses only high grade solvents,
which lead to its superior performance. However, as we'll see, solvents
are unnecessary in a high-quality pre-mix oil.
Finally, to deal with hotter temperatures, conventional 2-cycle oils
used in air-cooled applications must employ metal-containing (ash)
additives to overcome weaknesses in their base stocks. Since ashed
additive packages can cause fouling problems, these companies then
formulate a separate oil for cooler water-cooled applications.
The AMSOIL Solution:
The most striking thing to most customers about AMSOIL "Saber"
Synthetic 100:1 2-Cycle Oil is the 100:1 mix ratio.
Why can AMSOIL Synthetic 100:1 2-Cycle Oil be mixed at 100:1 while
other products are mixed at anywhere from 50:1 to 32:1? It's no mystery.
The answer has to do with solvents, or in this case a lack of them.
Solvents often comprise as much as 20-30 percent of a conventional
pre-mix 2-cycle oil. However, AMSOIL 100:1 2-Cycle Oil uses a
proprietary formulation that makes use of little or no solvents. This
technology actually delivers solvency characteristics while improving
lubricity instead of improving solvency at the expense of lubricity
Since AMSOIL is 100 percent active, it can be mixed at the economical
100:1 rate. But the high-performance features of AMSOIL Synthetic 100:1
2-Cycle Oil don't stop with the mix ratio:
The unique synthetic formulation used by AMSOIL is clean burning. The
lower emissions you can expect are much more in line with what current
and pending lubricant standards and environmental regulations demand,
not to mention what our environment deserves.
Due to the absence of solvents, fire and flash points are
dramatically higher. These higher flash and fire points help AMSOIL
products resist volatile evaporation. AMSOIL products provide enhanced
lubricity. This high lubricity, in turn, aids in engine cooling (since
much of the heat generated by an engine comes from friction) and
promotes faster response, greater efficiency and improved overall
There has an AMSOIL "Saber" Synthetic 100:1 2-Cycle Oil that is
perfect for nearly all pre-mix applications. The benefits of using
AMSOIL Synthetic 100:1 2-Cycle Oil are clear. You'll benefit from: an
economical mix ratio, reduced emissions, less engine fouling, cleaner
combustion, reduced smoke, greater efficiency, a cooler running engine,
lower volatility and improved performance. How can you lose?
We Offer More Than Just 2-Cycle Pre-Mix
As good as our "Saber" 100:1 Pre-Mix oil is, it's not designed for
oil injected 2-cycle engines. For that we have a line-up of 3 different
2-Cycle oils, depending upon your needs. You can find a listing of our
available 2-cycle oils below. Just click on the picture to learn more.
AMSOIL's 2-Cycle Line-Up
For an easy to understand chart showing exactly which of our 2-cycle
oils is best for your application, click on the link below:
AMSOIL 2-Cycle Oil
Application Chart (PDF in new window)
AMSOIL DOMINATOR Synthetic 2-Cycle Racing Oil is a robust formulation
specially engineered for unsurpassed protection in high performance
two-cycle motors, both on and off the track. It contains heavier
synthetic base oils that provide more lubricity for "on the edge"
operation. DOMINATOR reduces friction and protects pistons and bearings
subjected to the rigors of racing. DOMINATOR contains the right
additives for clean motor operation.
Although AMSOIL DOMINATOR can be used for non-racing applications,
our other 2-cycle oils are more suited to this purpose and are the
recommended choice if your 2-cycle engine is not MAINLY used for racing.
AMSOIL INTERCEPTOR Synthetic 2-Cycle Oil is engineered specially for
power sports applications and those engines equipped with exhaust power
valves. It contains the finest synthetic ester based oils and additives
available for exceptional cleanliness properties. INTERCEPTOR is the
result of years of field testing in the Rocky Mountain region, which
provided some of the most severe conditions possible. INTERCEPTOR excels
at controlling exhaust valve sticking and provides outstanding overall
INJECTOR: AMSOIL HP Injector Synthetic 2-Cycle Oil is a precise
synthetic formulation that exceeds the lubrication demands of modern
two-cycle engines. It contains premium synthetic base oils and MAX-DOSE
additive system, providing superior performance in direct fuel injected
(DFI), electronic fuel injected (EFI) and carbureted outboard motors, as
well as other recreational two-cycle equipment.
100:1: AMSOIL Saber Professional (ATP) and Saber Outboard (ATO)
Synthetic 2-Cycle Oils are specifically designed for lean 100:1 mix
ratios in pre-mix applications. Saber Professional contains high
temperature detergents for small power equipment. Saber Outboard
contains lower temperature dispersants for water-cooled outboard motors.
Extensive testing shows superior lubricity and cleanliness properties at
lean mix ratios of these premium synthetic formulations.