AMSOIL 20W-50 Synthetic Motorcycle Oil is a premium oil designed for
those who demand the absolute best lubrication for their motorcycles.
AMSOIL 20W-50 Motorcycle Oil is the result of extensive research and
is specially formulated to excel in all areas unique to motorcycles, including
the high temperatures of air-cooled engines such as Harley-Davidson® V-Twins, wet-clutch lubrication, extreme-pressure regions
of gears and chains and rust common to short trips and storage.
AMSOIL 20W-50 Synthetic Motorcycle Oil is multi-functional and fulfills
the requirements of both domestic and foreign motorcycles. It outperforms
other conventional and synthetic motorcycle oils. AMSOIL, the
leader in synthetic lubrication, produced the world’s first API-qualified
synthetic motor oil in 1972. Trust the extensive experience of AMSOIL,
The First in Synthetics,® to do the best job protecting your motorcycle.
Reduces Friction, Heat and Wear
In high heat conditions, engine
protection is not sacrificed with
AMSOIL Synthetic Motorcycle Oil. It
has exceptional high-temperature film
strength and contains a heavy treatment
of anti-wear additives to reduce wear
regardless of operating conditions.
AMSOIL 20W-50 Motorcycle Oil is
thermally (heat) stable and contains
maximum levels of oxidation inhibitor
additives. It is extremely resistant to
breakdown and engineered to prevent
damaging sludge and carbon deposits
for superior engine cleanliness.
Gears and Chains
With AMSOIL Synthetic Motorcycle
Oil, there is no need for separate
transmission or primary chaincase
lubricants. It is absolutely shear stable
and will not thin out from mechanical
activity. AMSOIL 20W-50 Motorcycle Oil
performs like a gear lube without the
negative effects of extreme-pressure
additives. In the FZG gear test, AMSOIL
achieved a perfect score with a “zero” wear rating (see test photo).
Delivers Superior Rust Protection
Motorcycles are prone to rust from
storage, humidity and short drives.
Rust can cause major damage such as
roller bearing failure, uncontrolled wear,
compression loss and blow-by. Good
rust protection, however, comes by
design and is not natural to engine oils.
Unlike many motorcycle oils, AMSOIL
Synthetic Motorcycle Oil contains special
anti-rust agents. It passes the ASTM
D-1748 humidity cabinet rust test and
clearly demonstrates superior rust
Wet Clutch Performance
AMSOIL 20W-50 Synthetic Motorcycle
Oil contains no friction modifiers and
promotes smooth shifting and positive
clutch engagement. It controls heat
and helps prevent slippage and
glazing, while its high TBN helps to
improve clutch life by resisting the acids
that can degrade clutch material.
AMSOIL Synthetic 20W-50 Motorcycle Oil is recommended
for air or liquid cooled 4-stroke engines. It meets
SAE 90, API GL-1 gear oil requirements and is recommended
for transmissions and primary chaincases.
AMSOIL MCV is recommended for Harley Davidson®,
Buell®, KTM, Ducati®, Aprilia®, BMW®, Triumph® and other
motorcycles where 15W-50 or 20W-50 engine oils or
SAE 90, GL-1 gear oils are used. Not recommended
where an API GL-4 or GL-5 gear oil is required.
AMSOIL Synthetic 20W-50 Motorcycle Oil is compatible
with conventional and synthetic motor oils;
however, mixing oils may shorten the oil life
expectancy and reduce the performance benefits.
AMSOIL does not support extended drain intervals
where oils have been mixed.
additives are not recommended for use with AMSOIL
Recommended for use up to twice the motorcycle manufacturer
change interval (miles/hours) or one year,
whichever comes first, in engines, transmissions and
primary chaincases. For Big Twin Harley-Davidson transmissions
only, follow the Harley-Davidson recommended
drain interval for synthetic oil of up to 20,000 miles or one
year, whichever comes first. When using an engine filter
other than AMSOIL Ea, change the filter at standard
For off-road use, change AMSOIL MCV at motorcycle
Racing or modified engines are excluded from extended
drain interval recommendations. Oil changes are at the
20W-50 Synthetic Motorcycle Oil (MCV)
Viscosity @ 100°C, cSt (ASTM D-445)
Viscosity @ 40°C, cSt (ASTM D-445)
Index (ASTM D-2270)
°C (°F) (ASTM D-97)
|Flash Point °C (°F) (ASTM
|High Temperature/High Shear
Viscosity (ASTM D-5481 @ 150°C , 1.0 x 106 s-1), cP
|Four Ball Wear Test (ASTM
D-4172 @ 40 kgf, 150°C, 1800 rpm, 1 hour),
|FZG (ASTM D-5182), Load Stage Pass (Wear in mm)
% weight loss (g/100g) (ASTM D-5800)
|Foam (ASTM D-892, Sequence I, II & III)
|Shear Stability Kurt Orbahn (ASTM D-6278), % viscosity change 120 cycles
|Rust Test - Humidity Cabinet (ASTM D-1748)
||No Rust, Pass