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AMSOIL 100:1 Pre-Mix 100% Synthetic 2-Stroke Outboard Oil8 oz. Bottle

Product code : ATOBC-EA

4.9 star rating

AMSOIL 100:1 Pre-Mix 100% Synthetic 2-Stroke Outboard Oil8 oz. Bottle

Product code : ATOBC-EA

4.9 star rating
Current price:
$7.39
Retail Price

Estimated delivery by Tue, Nov 17 to Columbus - 43215.
  • Performance-Engineered for Outboards


    • Protects two-stroke outboards at 100:1 mix ratios.
    • Prevents plug fouling and ring sticking.
    • Improves idling and throttle response.
    • Minimizes smoke and emissions.

  • 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.

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

About this item

  • AMSOIL Synthetic 2-Stroke Outboard Oil is engineered with low-temperature dispersants that reduce varnish and carbon deposits to help eliminate plug fouling and promote rapid throttle response in water-cooled outboard motors. Its environmentally friendly low-smoke, low-odor, low-toxicity properties produce fewer emissions at 100:1 mix ratios than other oils mixed at 50:1.

    Smokeless Protection
    AMSOIL Synthetic 2-Stroke Outboard Oil delivers superior lubricity and anti-wear protection at 100:1 mix ratios and burns clean to eliminate smoke and reduce emissions. It also inhibits rust and corrosion common to marine applications.

    Superior Performance
    AMSOIL Synthetic 2-Stroke Outboard Oil improves ignition, idling and throttle response in two-stroke engines by inhibiting deposit formation that causes plug fouling, ring sticking and exhaust port blockage.

    •    Prevents plug fouling and ring sticking.
    •    Improves idling and throttle response.
    •    Minimizes smoke and emissions.
    •    Maximizes torque and power.
    •    Protects at lean mix ratios.
    •    Inhibits rust and corrosion. 

    APPLICATIONS
    Use pre-mixed in two-stroke outboard motors, personal watercraft and jet boats that specify TC-W3. For maximum performance, mix with gasoline at 100:1 regardless of the mix ratio specified for the equipment. Richer mix ratios may be used if desired.

    RATIO OIL FUEL
    50:1 2.6 oz. 1 U.S. GALLON
    80:1 8.0 oz. 5 U.S. GALLONS
    100:1 8.0 oz. 6 U.S. GALLONS


    WARRANTY SECURE®    
    AMSOIL Synthetic 2-Stroke Outboard Oil is Warranty Secure, keeping your factory warranty intact. It is a high-performance replacement for manufacturer-branded oils and backed by the AMSOIL Limited Warranty (G1363). 

     

    Click here for Warranty Secure Details.

     

  • Data Bulletin

    Warranty

    SDS



  • 4.9 star rating
    • 5 star rating
      Use half the oil!
      By  PAUL,  a  Verified Buyer  from  Northern California  on  September 11, 2026
      For years I used the typical 50 to 1 2 stroke oil because that's what the manufactures recommended. A friend told me he ran Amsoil and never had a problem with his motor. Long story shortened, now I'm using Amsoil and my 1988 Evinrude 88spl is running better than it did with less smoking and quicker starts!
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Outboard 100:1 Pre-mix
      By  WILLIAM,  a  Verified Buyer  from  Montana  on  July 27, 2026
      I have to run my '92 Johnson 60 in too many 'No Wake' lakes. That makes the old two-stroke run dirty. Switched to this and mixed 75:1 to play it safe - motor runs way better, cleaner, can idle forever, cleaner/smoother at trolling speeds, and faster at WOT. So far, a major improvement over traditional 50:1 two-stroke outboard oil
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Great 2 cycle outboard engine oil
      By  KENNETH L,  a  Verified Buyer  from  Northwestern area of PA  on  February 18, 2026
      I have been using this oil in my Yamaha 90 HP 2 cycle outboard for 25+ years and the outboard is still going strong.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Good product....bad promotional gifts
      By  STEVE,  a  Verified Buyer  from  Augusta Ga  on  July 10, 2024
      Great product but that was a joke of a hat. Made to fit a 4 year old.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Great product
      By  SHALAKO,  a  Verified Buyer  from  Mocksville, NC  on  May 26, 2024
      This is a great product, however I did not receive the free headlamp with my purchase.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Pleasantly Surprised, Great Oil
      By  KEVIN,  a  Verified Buyer  from  Mississippi   on  May 25, 2024
      I’m running 80:1 in premix Johnson 115 outboard and I’m impressed. I pulled the plugs and I’ve never seen them that clean. It does smoke some at start up and I think my carbs are set rich but nothing like before. So far so good and I will keep using this as long as I have a 2 stroke outboard.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Great product
      By  JASON,  a  Verified Buyer  on  May 01, 2024
      Great product
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      2 cycle oil
      By  CLIFFORD,  a  Verified Buyer  from  Hinesburg, VT 05461  on  October 15, 2023
      We operate a forest products business and use this oil for our chainsaws. very reliable and easy to use.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Works great
      By  PRESTON,  a  Verified Buyer  from  Louisiana  on  April 11, 2023
      Keeps my outboards running fine . Very good lubricant.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      2 cycle.
      By  BILLY,  a  Verified Buyer  from  Arbuckle  on  May 31, 2022
      Great product. Works perfect.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
  • Performance-Engineered for Outboards


    • Protects two-stroke outboards at 100:1 mix ratios.
    • Prevents plug fouling and ring sticking.
    • Improves idling and throttle response.
    • Minimizes smoke and emissions.

  • 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.

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

  • AMSOIL Synthetic 2-Stroke Outboard Oil is engineered with low-temperature dispersants that reduce varnish and carbon deposits to help eliminate plug fouling and promote rapid throttle response in water-cooled outboard motors. Its environmentally friendly low-smoke, low-odor, low-toxicity properties produce fewer emissions at 100:1 mix ratios than other oils mixed at 50:1.

    Smokeless Protection
    AMSOIL Synthetic 2-Stroke Outboard Oil delivers superior lubricity and anti-wear protection at 100:1 mix ratios and burns clean to eliminate smoke and reduce emissions. It also inhibits rust and corrosion common to marine applications.

    Superior Performance
    AMSOIL Synthetic 2-Stroke Outboard Oil improves ignition, idling and throttle response in two-stroke engines by inhibiting deposit formation that causes plug fouling, ring sticking and exhaust port blockage.

    •    Prevents plug fouling and ring sticking.
    •    Improves idling and throttle response.
    •    Minimizes smoke and emissions.
    •    Maximizes torque and power.
    •    Protects at lean mix ratios.
    •    Inhibits rust and corrosion. 

    APPLICATIONS
    Use pre-mixed in two-stroke outboard motors, personal watercraft and jet boats that specify TC-W3. For maximum performance, mix with gasoline at 100:1 regardless of the mix ratio specified for the equipment. Richer mix ratios may be used if desired.

    RATIO OIL FUEL
    50:1 2.6 oz. 1 U.S. GALLON
    80:1 8.0 oz. 5 U.S. GALLONS
    100:1 8.0 oz. 6 U.S. GALLONS


    WARRANTY SECURE®    
    AMSOIL Synthetic 2-Stroke Outboard Oil is Warranty Secure, keeping your factory warranty intact. It is a high-performance replacement for manufacturer-branded oils and backed by the AMSOIL Limited Warranty (G1363). 

     

    Click here for Warranty Secure Details.

     

  • Data Bulletin

    Warranty

    SDS



  • 4.9 star rating
    • 5 star rating
      Use half the oil!
      By  PAUL,  a  Verified Buyer  from  Northern California  on  September 11, 2026
      For years I used the typical 50 to 1 2 stroke oil because that's what the manufactures recommended. A friend told me he ran Amsoil and never had a problem with his motor. Long story shortened, now I'm using Amsoil and my 1988 Evinrude 88spl is running better than it did with less smoking and quicker starts!
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Outboard 100:1 Pre-mix
      By  WILLIAM,  a  Verified Buyer  from  Montana  on  July 27, 2026
      I have to run my '92 Johnson 60 in too many 'No Wake' lakes. That makes the old two-stroke run dirty. Switched to this and mixed 75:1 to play it safe - motor runs way better, cleaner, can idle forever, cleaner/smoother at trolling speeds, and faster at WOT. So far, a major improvement over traditional 50:1 two-stroke outboard oil
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Great 2 cycle outboard engine oil
      By  KENNETH L,  a  Verified Buyer  from  Northwestern area of PA  on  February 18, 2026
      I have been using this oil in my Yamaha 90 HP 2 cycle outboard for 25+ years and the outboard is still going strong.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Good product....bad promotional gifts
      By  STEVE,  a  Verified Buyer  from  Augusta Ga  on  July 10, 2024
      Great product but that was a joke of a hat. Made to fit a 4 year old.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Great product
      By  SHALAKO,  a  Verified Buyer  from  Mocksville, NC  on  May 26, 2024
      This is a great product, however I did not receive the free headlamp with my purchase.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Pleasantly Surprised, Great Oil
      By  KEVIN,  a  Verified Buyer  from  Mississippi   on  May 25, 2024
      I’m running 80:1 in premix Johnson 115 outboard and I’m impressed. I pulled the plugs and I’ve never seen them that clean. It does smoke some at start up and I think my carbs are set rich but nothing like before. So far so good and I will keep using this as long as I have a 2 stroke outboard.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Great product
      By  JASON,  a  Verified Buyer  on  May 01, 2024
      Great product
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      2 cycle oil
      By  CLIFFORD,  a  Verified Buyer  from  Hinesburg, VT 05461  on  October 15, 2023
      We operate a forest products business and use this oil for our chainsaws. very reliable and easy to use.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      Works great
      By  PRESTON,  a  Verified Buyer  from  Louisiana  on  April 11, 2023
      Keeps my outboards running fine . Very good lubricant.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?
    • 5 star rating
      2 cycle.
      By  BILLY,  a  Verified Buyer  from  Arbuckle  on  May 31, 2022
      Great product. Works perfect.
      Bottom Line
      Yes, I would recommend this to a friend.
      Was this review helpful?