About this item

• Product Overview

  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 breakdown 6X better than Harley-Davidson SYN3 for improved protection against compensator and transmission gear wear.¹
  • Contains heavy treatment of anti-wear additives to reduce wear in the most extreme operating conditions.
  • Fortified with maximum levels of oxidation inhibitors to fight deposits for maximum engine compression and power.

  ---

  Resists Viscosity Breakdown

  AMSOIL resists viscosity breakdown 6X better than Harley-Davidson SYN3 for improved protection against compensator and transmission gear wear.¹

  ¹Based on testing of AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil and Harley-Davidson Screamin’ Eagle SYN3 purchased on 1/26/24 in the CEC L45-KRL, ASTM D445 test.

   

   

  ---

  WITHSTANDS EXTREME HEAT

  • Formulated with naturally heat-resistant synthetic base oils that resist oxidation in extreme summer heat and during strenuous stop-and-go rally or parade traffic.
  • Unique additive system helps keep engines clean and running efficiently 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).

   

   

  ---

  PROTECTS TRANSMISSIONS & PRIMARIES

  • Shear-stable formulation resists thinning from mechanical activity to protect transmissions and primaries from wear.
  • Performs like a gear lube without the negative effects of extreme-pressure additives.
  • Delivers the convenience of one lubricant for all three sumps.

  ---

  TRUSTED BY PROFESSIONALS

  AMSOIL Synthetic V-Twin Motorcycle Oil is the top choice of hardcore riders everywhere. Here’s what some have to say.

   

   

  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.

• Technical Specifications
  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  4.9 star rating

  Based on 1,611 reviews

  Based on 1,611 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    good oil
    By  DONALD,  a  Verified Buyer  from  California  on  June 01, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    good
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 4 star rating
    Andy's electric glide
    By  ANDY,  a  Verified Buyer  from  Wisconsin  on  May 31, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Did oil change today . I've always been a fan .. be a minute b4 i know 4 sure
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great Product
    By  DAVE,  a  Verified Buyer  on  May 30, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Seems to make engine quieter.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Preference
    By  Tibe,  a  Verified Buyer  from  Minnesota  on  May 29, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Bought the bulk containers to see how alternative container works. It is better for storage but adds a second step when changing oil. Funnel into engine needs a slower steady rate to prevent overflow. Easier to pour into measuring cup and adding oil. Will probably go back to quart containers.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Oil
    By  VINCENT,  a  Verified Buyer  on  May 28, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Very good Oil would would definitely recommend it
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great product
    By  ROB,  a  Verified Buyer  on  May 26, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    My 103 loves this stuff. I will purchase again.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Hands down best oil
    By  BRADLEY,  a  Verified Buyer  from  Canada BC  on  May 23, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Great oil with top-quality performance. My bike runs smoother with this oil than with any other brand I’ve used. Even after long rides on hot days, the engine stays quiet and I don’t get the ticking noise from heat that I experienced with other oils. I’ll continue using this oil for the life of this bike and any future bikes I own.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Indian springfield dark horse
    By  DANIEL,  a  Verified Buyer  from  NY  on  May 18, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I use this for my 23 Indian springfield dark horse. It works great. Shipping is fast and accurate
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    HD V- twin
    By  CC,  a  Verified Buyer  from  Tx  on  May 18, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Swapped to AMSOIL from factory oil. Seems like a good choice so far.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great product
    By  CHIP,  a  Verified Buyer  from  colorado  on  May 16, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Again have used the Harley SYN oil in for years.. I have a 2012 Road Glide and made the change.. Engine quieter.. more oil pressure and runs great.. And a better price as we’ll.. A NO brainer ….
    Was this review helpful?

    YES (2) NO (0)

• Highlights

  • Resists viscosity breakdown 6X better than Harley-Davidson* SYN3* for improved protection against compensator and transmission gear wear.¹
  • Resists extreme heat to help keep engines clean and efficient.
  • Reduces wear and deposits for maximum engine compression and power.
  • Convenience of one lubricant for all three sumps.

    *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.
    ¹Based on testing of AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil and Harley-Davidson Screamin’ Eagle SYN3 purchased on 1/26/24 in the CEC L45-KRL, ASTM D445 test.

• Returns

  We offer easy returns for customers. If your product is unused and unopened, you may return it within 30 days for a full refund of the purchase price. View full AMSOIL Return Policy.

• Payments

  We accept Visa, Mastercard, American Express, Discover and PayPal, and provide secure checkout and encrypted payment processing.

• Product Overview

  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 breakdown 6X better than Harley-Davidson SYN3 for improved protection against compensator and transmission gear wear.¹
  • Contains heavy treatment of anti-wear additives to reduce wear in the most extreme operating conditions.
  • Fortified with maximum levels of oxidation inhibitors to fight deposits for maximum engine compression and power.

  ---

  Resists Viscosity Breakdown

  AMSOIL resists viscosity breakdown 6X better than Harley-Davidson SYN3 for improved protection against compensator and transmission gear wear.¹

  ¹Based on testing of AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil and Harley-Davidson Screamin’ Eagle SYN3 purchased on 1/26/24 in the CEC L45-KRL, ASTM D445 test.

   

   

  ---

  WITHSTANDS EXTREME HEAT

  • Formulated with naturally heat-resistant synthetic base oils that resist oxidation in extreme summer heat and during strenuous stop-and-go rally or parade traffic.
  • Unique additive system helps keep engines clean and running efficiently 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).

   

   

  ---

  PROTECTS TRANSMISSIONS & PRIMARIES

  • Shear-stable formulation resists thinning from mechanical activity to protect transmissions and primaries from wear.
  • Performs like a gear lube without the negative effects of extreme-pressure additives.
  • Delivers the convenience of one lubricant for all three sumps.

  ---

  TRUSTED BY PROFESSIONALS

  AMSOIL Synthetic V-Twin Motorcycle Oil is the top choice of hardcore riders everywhere. Here’s what some have to say.

   

   

  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.

• Technical Specifications
  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  4.9 star rating

  Based on 1,611 reviews

  Based on 1,611 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    good oil
    By  DONALD,  a  Verified Buyer  from  California  on  June 01, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    good
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 4 star rating
    Andy's electric glide
    By  ANDY,  a  Verified Buyer  from  Wisconsin  on  May 31, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Did oil change today . I've always been a fan .. be a minute b4 i know 4 sure
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great Product
    By  DAVE,  a  Verified Buyer  on  May 30, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Seems to make engine quieter.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Preference
    By  Tibe,  a  Verified Buyer  from  Minnesota  on  May 29, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Bought the bulk containers to see how alternative container works. It is better for storage but adds a second step when changing oil. Funnel into engine needs a slower steady rate to prevent overflow. Easier to pour into measuring cup and adding oil. Will probably go back to quart containers.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Oil
    By  VINCENT,  a  Verified Buyer  on  May 28, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Very good Oil would would definitely recommend it
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great product
    By  ROB,  a  Verified Buyer  on  May 26, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    My 103 loves this stuff. I will purchase again.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Hands down best oil
    By  BRADLEY,  a  Verified Buyer  from  Canada BC  on  May 23, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Great oil with top-quality performance. My bike runs smoother with this oil than with any other brand I’ve used. Even after long rides on hot days, the engine stays quiet and I don’t get the ticking noise from heat that I experienced with other oils. I’ll continue using this oil for the life of this bike and any future bikes I own.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Indian springfield dark horse
    By  DANIEL,  a  Verified Buyer  from  NY  on  May 18, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I use this for my 23 Indian springfield dark horse. It works great. Shipping is fast and accurate
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    HD V- twin
    By  CC,  a  Verified Buyer  from  Tx  on  May 18, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Swapped to AMSOIL from factory oil. Seems like a good choice so far.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great product
    By  CHIP,  a  Verified Buyer  from  colorado  on  May 16, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Again have used the Harley SYN oil in for years.. I have a 2012 Road Glide and made the change.. Engine quieter.. more oil pressure and runs great.. And a better price as we’ll.. A NO brainer ….
    Was this review helpful?

    YES (2) NO (0)