About this item

• Product Overview

  HP = high performance. Advanced formulation delivers increased lubricity to fight piston and cylinder wear, even during lean-mix operation. Potent detergents help prevent piston-ring and exhaust-port deposits despite high-stress, all-day operation. Low-smoke, low-odor formulation also provides low aquatic toxicity.

  See the product data sheet for full details.

  OUTSTANDING WEAR PROTECTION

  • Exclusive synthetic formulation provides increased lubricity for reduced engine wear during normal and lean-mix operation.
  • Prevents piston ring sticking and piston scuffing for maximum power and long engine life.

  RESISTS DEPOSITS

  • Formulated with MAXDOSE,* a system of advanced additives for "super-clean" operation.
  • Helps prevent piston and exhaust-port deposits for reliable, efficient operation and long engine life.

  See the product data sheet for full details.

• Technical Specifications
  Performance Studies

  Marine E-TEC Field Study

  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  5 star rating

  Based on 140 reviews

  Based on 140 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Great Oil but......
    By  ROY,  a  Verified Buyer  from  michigan  on  September 26, 2025

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    This is the best oil for an old two stroke cleanest plugs I’ve ever seen but the discount coupons expire too soon and the gimmicky free gifts are a joke
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oil is great , price and shiping is super
    By  DAVE,  a  Verified Buyer  from  North Bay, Ont  on  September 19, 2025

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    This is about half the price of the mercury optimax DFI oil, and Amsoil is always available, which can't be said for the merc product. I've placed 2 orders for this oil and both times, it arrived on my doorstep within 2 days. Can't be happier.
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Quality product
    By  AFTON,  a  Verified Buyer  on  September 16, 2025

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    Been using amsoil for my 2 stroke 250 Yamaha HPDI and have had no issues.
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    motor
    By  ANTHONY,  a  Verified Buyer  from  Port Colborne Ontario Canada  on  August 24, 2025

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    All my 2 stroke friends love this oil Minimal carbon build up will idling minimal smoke
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Amsoil HP Marine 2 stroke injector/ 50:1 mix oil
    By  Sean007,  a  Verified Buyer  on  August 12, 2025

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    Bought this for an older 2 stroke outboard that I recently got, now the outboard hardly smokes and there isn’t the usual 2 stroke smell.
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    Best for my pre-mix
    By  SCOTT,  a  Verified Buyer  from  Saskatchewan   on  August 03, 2025

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    Outboard runs better and better every tank. May cost a little more but no question, it's worth it
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    Great product
    By  FRED,  a  Verified Buyer  from  North Dakota   on  June 03, 2025

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    I’ve never used any other oil in my outboard motors for years. This oil performs better than any other oil I’ve seen.
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Clean protection
    By  DAVID,  a  Verified Buyer  on  June 01, 2025

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    Started using this in my Mercury Optimax 200. Burns cleaner and doesn't gum up on the oil pickup screen like the recommended oils that Mercury pushes for its motors. Great piece of mind on a 20000 dollar outboard and I couldn't be happier!
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Oil switch
    By  KEVIN,  a  Verified Buyer  from  London,Ontario  on  April 18, 2025

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    Have been using HP Marine 2-Stroke for the past 3 years in my 2003 Mercury 225 Optimax now and what a difference! The motor run quieter and more smooth!! I love the reason that it is 100% full synthetic...I have been using full synthetic oil in all my vehicles and highly believe in it. Another reason is the price compared to Optimax oil...can't beat it and it exceeds all specs. Delivery was excellent and on time. With Amsoil being around for a long time with an excellent reputation how can anyone go wrong. Very satisfied with this product!!! Will continue to use Amsoil products for years to come...keep up the good work Amsoil!!
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    The best oil I have ever used!!
    By  MIKE,  a  Verified Buyer  from  Gainesville, Ga.  on  November 02, 2024

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    Only the best for my boat! I have used Amsoil since I bought my boat back in 1989. I tend to keep everything until it wears out and so far the 90 hp Johnson still has high compression in all 3 cylinders! Very lowe smoke on the lake.....!
    Bottom Line

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

    YES (1) NO (0)

• Highlights

  • Excellent for Evinrude* E-TEC* factory-lean setting
  • Helps prevent deposits
  • Protects against wear
  • Low smoke
  • Protects against rust
  • Low aquatic toxicity
  • Superior performance as an injection oil or at 50:1 pre-mix
• 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

  HP = high performance. Advanced formulation delivers increased lubricity to fight piston and cylinder wear, even during lean-mix operation. Potent detergents help prevent piston-ring and exhaust-port deposits despite high-stress, all-day operation. Low-smoke, low-odor formulation also provides low aquatic toxicity.

  See the product data sheet for full details.

  OUTSTANDING WEAR PROTECTION

  • Exclusive synthetic formulation provides increased lubricity for reduced engine wear during normal and lean-mix operation.
  • Prevents piston ring sticking and piston scuffing for maximum power and long engine life.

  RESISTS DEPOSITS

  • Formulated with MAXDOSE,* a system of advanced additives for "super-clean" operation.
  • Helps prevent piston and exhaust-port deposits for reliable, efficient operation and long engine life.

  See the product data sheet for full details.

• Technical Specifications
  Performance Studies

  Marine E-TEC Field Study

  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  5 star rating

  Based on 140 reviews

  Based on 140 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Great Oil but......
    By  ROY,  a  Verified Buyer  from  michigan  on  September 26, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    This is the best oil for an old two stroke cleanest plugs I’ve ever seen but the discount coupons expire too soon and the gimmicky free gifts are a joke
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Oil is great , price and shiping is super
    By  DAVE,  a  Verified Buyer  from  North Bay, Ont  on  September 19, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    This is about half the price of the mercury optimax DFI oil, and Amsoil is always available, which can't be said for the merc product. I've placed 2 orders for this oil and both times, it arrived on my doorstep within 2 days. Can't be happier.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Quality product
    By  AFTON,  a  Verified Buyer  on  September 16, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Been using amsoil for my 2 stroke 250 Yamaha HPDI and have had no issues.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    motor
    By  ANTHONY,  a  Verified Buyer  from  Port Colborne Ontario Canada  on  August 24, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    All my 2 stroke friends love this oil Minimal carbon build up will idling minimal smoke
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Amsoil HP Marine 2 stroke injector/ 50:1 mix oil
    By  Sean007,  a  Verified Buyer  on  August 12, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Bought this for an older 2 stroke outboard that I recently got, now the outboard hardly smokes and there isn’t the usual 2 stroke smell.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Best for my pre-mix
    By  SCOTT,  a  Verified Buyer  from  Saskatchewan   on  August 03, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Outboard runs better and better every tank. May cost a little more but no question, it's worth 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  FRED,  a  Verified Buyer  from  North Dakota   on  June 03, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I’ve never used any other oil in my outboard motors for years. This oil performs better than any other oil I’ve seen.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Clean protection
    By  DAVID,  a  Verified Buyer  on  June 01, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Started using this in my Mercury Optimax 200. Burns cleaner and doesn't gum up on the oil pickup screen like the recommended oils that Mercury pushes for its motors. Great piece of mind on a 20000 dollar outboard and I couldn't be happier!
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Oil switch
    By  KEVIN,  a  Verified Buyer  from  London,Ontario  on  April 18, 2025

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Have been using HP Marine 2-Stroke for the past 3 years in my 2003 Mercury 225 Optimax now and what a difference! The motor run quieter and more smooth!! I love the reason that it is 100% full synthetic...I have been using full synthetic oil in all my vehicles and highly believe in it. Another reason is the price compared to Optimax oil...can't beat it and it exceeds all specs. Delivery was excellent and on time. With Amsoil being around for a long time with an excellent reputation how can anyone go wrong. Very satisfied with this product!!! Will continue to use Amsoil products for years to come...keep up the good work Amsoil!!
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    The best oil I have ever used!!
    By  MIKE,  a  Verified Buyer  from  Gainesville, Ga.  on  November 02, 2024

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Only the best for my boat! I have used Amsoil since I bought my boat back in 1989. I tend to keep everything until it wears out and so far the 90 hp Johnson still has high compression in all 3 cylinders! Very lowe smoke on the lake.....!
    Bottom Line

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

    YES (1) NO (0)