The Benefits of AMSOIL Synthetic Motor Oils

Improved Performance
More Power
The smooth molecular structures of AMSOIL synthetic motor oils create less intrafluid friction than the
relatively rough molecular structures of conventional motor oils, while their high film strengths reduce
metal-to-metal friction.  Engines running AMSOIL synthetic motor oil waste less energy overcoming
intrafluid and metal-to-metal friction, allowing them to deliver more power to the transmission.  Vehicles
respond quicker and achieve faster top speeds.

Increased Fuel Economy
The low intrafluid friction and metal-to-metal friction-reducing properties of AMSOIL synthetic motor oils
also improve fuel economy by delivering more of the energy created through combustion of the air-fuel
mixture to the transmission.

Unlike conventional oils, AMSOIL synthetic motor oils contain no light molecules that may be lost to
volatilization.  Volatilization thickens conventional oils and makes them more difficult to pump, while the
low volatilization of AMSOIL synthetic motor oils helps them maintain their original viscosity and fuel
economy benefits.

Cold-Temperature Starting
AMSOIL synthetic motor oils retain better cold-temperature cranking and pumping characteristics than
petroleum oils. Because AMSOIL synthetic motor oils resist viscosity increases in cold temperatures,
they allow the crankshaft to turn fast enough to start the engine in cold winter temperatures.
Resistance to cold-temperature viscosity increases also allows AMSOIL synthetic motor oils to maintain
their pumpability for fast poststartup engine lubrication and excellent wear protection.

Increased Vehicle Life

Wear Control
Viscosity Retention – The superior chemistry of AMSOIL synthetic motor oils helps them maintain
thick protective oil films in high-temperature operating conditions. Many competing motor oils contain
low-quality additives prone to rupture during periods of mechanical stress, affecting the oil’s ability to
maintain a thick protective oil film during high-temperature operating conditions and exposing critical
engine parts to increased levels of wear.
Film Strength – AMSOIL synthetic motor oils feature molecules of uniform size and shape and
uniformly-strong intermolecular bonds, helping them maintain an unbroken lubricating film even when
faced with stressful engine operations such as rapid acceleration and deceleration.
Corrosion Protection – Acids form as combustion byproducts, such as water, combine with oxidation
byproducts or fuel or air constituents such as sulfur or nitrogen. Acids corrode metals, while heat helps
acids damage metal engine parts very rapidly. AMSOIL synthetic motor oils contain highly-effective
acid-neutralizing additives, something especially beneficial for diesel engines.
Water is a normal combustion byproduct that condenses on engine surfaces once they cool. Allowed
to remain on these engine surfaces, it promotes corrosion. Stored engines are particularly
prone to corrosion damage. AMSOIL synthetic motor oils form a water occlusive barrier on metal
surfaces, protecting them from corrosion.
Foam Suppression – Engine operation can whip air into motor oil and impair its ability to provide
adequate wear protection.  Anti-foam additives in AMSOIL synthetic motor oils enhance wear
protection by collapsing entrained air bubbles.  
Contaminant Suspension – Dirt, engine wear metals and combustion byproducts such as soot work
to accelerate engine wear.  Motor oil reduces the damage caused by these contaminants by carrying
them to the oil filter, where they become trapped.  AMSOIL synthetic motor oils are formulated with
highly-effective dispersant additives that keep contaminants suspended in the oil stream until they
reach the oil filter.  Diesel engines are particularly subject to soot contamination. AMSOIL synthetic
motor oils reduce damage caused by soot by keeping soot particles from agglomerating. As soot
agglomerates and particles grow in size, wear can occur. Furthermore, viscosity increases, which may
lead to filter plugging.

Heat Stress Control
Heat Transfer – Excessive engine heat promotes excessive engine wear and can lead to part failure.
The saturated molecular structure of AMSOIL synthetic motor oils withstands higher temperatures than
conventional oils before the oil breaks down.  AMSOIL synthetic motor oils possess a high degree of
thermal conductivity, providing cooler-running engines.  
Thermal Stability – The uniformly-sized and -shaped molecules and uniformly strong intermolecular
bonds of AMSOIL synthetic motor oils remain intact during high-temperature operation, protecting
engines from varnish and coke and providing constant lubrication protection during extreme-
temperature operation.
Low Volatility – The light molecules present in conventional oils tend to volatilize in the presence of
heat, thickening the oil and making it more difficult to pump, stressing the engine, increasing wear and
decreasing fuel economy. Because they contain no light molecules that volatilize in the presence of
heat, AMSOIL synthetic motor oils maintain their superior protection qualities in high-temperature
operating conditions.
Oxidative Stability – Certain oxidation products, such as sludge, interfere with the engine’s ability to
function, while others, such as acids, contribute to engine damage. AMSOIL synthetic motor oils are
highly supplemented with multiple premium-grade oxidation inhibitors, effectively resisting oxidation.


Other Benefits
Reduced Repairs – The superior protection and performance benefits of AMSOIL synthetic motor oils
reduce engine component failures, saving time and money spent on engine repairs.
Reduced Maintenance – The superior formulations of AMSOIL synthetic motor oils allow them to last
much longer than competing conventional and synthetic motor oils. While competing motor oil
companies typically recommend 3,000-mile drain intervals, AMSOIL synthetic motor oils are
recommended for drain intervals of up to 25,000 miles or one year, whichever comes first.
Reduced Solid Waste – Because AMSOIL synthetic motor oils may be used over eight times longer
than conventional oils, AMSOIL users produce significantly less used oil waste.
Reduced Air Pollution – Because AMSOIL synthetic motor oils improve fuel economy, they effectively
reduce harmful exhaust emissions.
Save Money – AMSOIL synthetic motor oils save money by extending engine life, reducing repairs
and maintenance, increasing oil drain intervals and increasing fuel economy.