20W-50 Synthetic V-Twin Motorcycle Oil
High-Performance Lubricant for Engines, Transmissions and Primary
Advanced multi-functional formula for both domestic and foreign motorcycles. Excellent in air-cooled motorcycle
engines due to high heat resistance. Can be used in engines, transmissions and the primary chaincase. Not
recommended where an API GL-4 or GL-5 gear oil is required.
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AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil is a premium oil designed for those who demand the absolute best
lubrication for their motorcycles. It 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 Synthetic V-Twin Motorcycle Oil is multi-functional and fulfills the requirements of both domestic
and foreign motorcycles.
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
Reduces Wear and Deposits
AMSOIL Synthetic V-Twin Motorcycle Oil contains a heavy treatment
of anti-wear additives to reduce wear regardless of the operating conditions. It is thermally (heat) stable and
contains maximum levels of oxidation inhibitor additives. After 250 hours (13,647 miles) on an engine dyno, AMSOIL
Synthetic V-Twin Motorcycle Oil eliminated piston scuffing and wear for long engine life and maximum power (see
Withstands Extreme Heat
Big, powerful V-twin engines run extremely hot, especially in summer during stop-and-go rally or parade traffic.
High heat breaks down oil formulated for standard service, inviting wear and performance-robbing deposits. AMSOIL
Synthetic V-Twin Motorcycle Oil is formulated with naturally heat-resistant synthetic base oils that resist
oxidation in extreme heat. Its unique additive system helps keep engines clean and running efficiently in the
toughest riding conditions.
Extreme-Pressure Protection for Gears and Chains
AMSOIL Synthetic V-Twin Motorcycle Oil
delivers exceptional protection in transmissions and primary chaincases. It is absolutely shear stable and will not
thin out from mechanical activity. AMSOIL 20W-50 V-Twin 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"
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, wear, compression loss and blow-by. Good rust protection, however, comes by design and is not
natural to motor oils. Unlike many motorcycle oils, AMSOIL Synthetic Motorcycle Oil contains special antirust
agents. It passes the ASTM D1748 humidity cabinet rust test, demonstrating superior rust protection to help your
engine achieve maximum performance and long life.
- Resists extreme heat
- Retains viscosity for excellent wear protection
- Convenience of one lubricant for all three sumps
- Provides Excellent Wet-Clutch Performance
AMSOIL 20W-50 Synthetic V-Twin 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
improve clutch life by resisting the acids that can degrade clutch material.
Use in motorcycles that require 15W-50 or 20W-50 motorcycle oil and any of the specifications listed below,
including those made by Harley-Davidson*, Buell*, Ducati*, Aprilia*, BMW* and Triumph*.
JASO MA/MA-2 • API SG/SL/CF/CG-4 • ISO-L-EMA2
Do not use where an API GL-4 or GL-5 gear oil is required.
AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil is compatible with other
synthetic and conventional motor oils. Mixing AMSOIL oils with other oils, however, will shorten the oil’s life
expectancy and reduce its performance benefits. AMSOIL does not support extended drain intervals where oils have
Aftermarket oil additives are not recommended for use with AMSOIL Synthetic Motorcycle Oils.
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 intervals.
For off-road use, change AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil at motorcycle manufacturer-recommended
Racing or modified engines are excluded from extended drain interval recommendations. Oil changes are at the
AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil is Warranty Secure, keeping your factory warranty intact. AMSOIL
20W-50 Synthetic V-Twin Motorcycle Oil is a high-performance replacement for vehicle manufacturer-branded products
and is also backed by the AMSOIL Limited Warranty. For details, visit www.amsoil.com/warrantysecure.
HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended applications and according to the
recommendations in the Safety Data Sheet (SDS). An SDS is available via the Internet at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children.
Recycle used oil and bottle.
*All trademarked names and images are the property of their respective owners and may be registered marks in
some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products
advertised here are AMSOIL-engineered for use in the applications shown.