

AMSOIL 20W-50 100% Synthetic V-Twin Motorcycle Oil 3.78 Liter Jug
MCV1GC-EA
Engineered for maximum performance in V-twin engines, motorcycle transmissions and primary chaincases. Protects against extreme heat. Wet-clutch compatible. Advanced synthetic formulation resists viscosity loss to keep critical components clean and protected.
See the Product Data Bulletin for full details.
REDUCES WEAR & DEPOSITS
- Resists viscosity breakdownĀ 6X betterĀ than Harley-Davidson SYN3 forĀ improved protectionĀ against compensator and transmission gear wear.1
- Contains heavy treatment of anti-wear additives toĀ reduce wearĀ in the mostĀ extreme operating conditions.
- Fortified with maximum levels of oxidation inhibitors toĀ fight depositsĀ forĀ maximum engine compressionĀ andĀ power.
Resists Viscosity Breakdown
AMSOIL resists viscosity breakdownĀ 6X betterĀ than Harley-Davidson SYN3 forĀ improved protectionĀ against compensator and transmission gear wear.1

1Based on testing of AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil and Harley-Davidson Screaminā Eagle SYN3 purchased on 1/26/24 in the CEC L45-KRL, ASTM D445 test.
Ā
WITHSTANDS EXTREME HEAT
- Formulated with naturally heat-resistant synthetic base oils thatĀ resist oxidationĀ in extreme summer heat and during strenuous stop-and-go rally or parade traffic.
- Unique additive system helpsĀ keep engines cleanĀ andĀ running efficientlyĀ in the toughest riding conditions.
- Prevented piston-ring sticking and protected against piston scuffing after 1,000 miles (1,609 km) of extreme-heat dyno testing during which cylinder temperatures reached 421°F (216°C) (see video below).
Ā
PROTECTS TRANSMISSIONS & PRIMARIES
- Shear-stable formulation resists thinning from mechanical activity toĀ protect transmissionsĀ andĀ primaries from wear.
- PerformsĀ like a gear lube without the negative effects of extreme-pressure additives.
- Delivers theĀ convenienceĀ of one lubricant for all three sumps.
TRUSTED BY PROFESSIONALS
AMSOIL Synthetic V-Twin Motorcycle Oil is the top choice of hardcore riders everywhere. Hereās what some have to say.
Ā
See the Product Data Bulletin for full details.
*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.
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Description
MCV1GC-EA
Engineered for maximum performance in V-twin engines, motorcycle transmissions and primary chaincases. Protects against extreme heat. Wet-clutch compatible. Advanced synthetic formulation resists viscosity loss to keep critical components clean and protected.
See the Product Data Bulletin for full details.
REDUCES WEAR & DEPOSITS
- Resists viscosity breakdownĀ 6X betterĀ than Harley-Davidson SYN3 forĀ improved protectionĀ against compensator and transmission gear wear.1
- Contains heavy treatment of anti-wear additives toĀ reduce wearĀ in the mostĀ extreme operating conditions.
- Fortified with maximum levels of oxidation inhibitors toĀ fight depositsĀ forĀ maximum engine compressionĀ andĀ power.
Resists Viscosity Breakdown
AMSOIL resists viscosity breakdownĀ 6X betterĀ than Harley-Davidson SYN3 forĀ improved protectionĀ against compensator and transmission gear wear.1

1Based on testing of AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil and Harley-Davidson Screaminā Eagle SYN3 purchased on 1/26/24 in the CEC L45-KRL, ASTM D445 test.
Ā
WITHSTANDS EXTREME HEAT
- Formulated with naturally heat-resistant synthetic base oils thatĀ resist oxidationĀ in extreme summer heat and during strenuous stop-and-go rally or parade traffic.
- Unique additive system helpsĀ keep engines cleanĀ andĀ running efficientlyĀ in the toughest riding conditions.
- Prevented piston-ring sticking and protected against piston scuffing after 1,000 miles (1,609 km) of extreme-heat dyno testing during which cylinder temperatures reached 421°F (216°C) (see video below).
Ā
PROTECTS TRANSMISSIONS & PRIMARIES
- Shear-stable formulation resists thinning from mechanical activity toĀ protect transmissionsĀ andĀ primaries from wear.
- PerformsĀ like a gear lube without the negative effects of extreme-pressure additives.
- Delivers theĀ convenienceĀ of one lubricant for all three sumps.
TRUSTED BY PROFESSIONALS
AMSOIL Synthetic V-Twin Motorcycle Oil is the top choice of hardcore riders everywhere. Hereās what some have to say.
Ā
See the Product Data Bulletin for full details.
*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.























