About this item

• Product Overview

  AMSOIL 5W-30 100% Synthetic Small-Engine Oil
  Delivers commercial-grade protection and outperforms conventional oils. Tough formulation protects against wear, heat and carbon deposits. Helps maintain power and promotes long engine life. Specifically designed for maximum equipment dependability. Service life up to 200 hours.

  See the product data sheet for full details.

  EXCELLENT WEAR PROTECTION

  • Shear-stable, high-film-strength formulation fortified with anti-wear additives.
  • Does not thin out due to mechanical shear, ensuring a thick lubricating film for maximum wear protection.
  • Specialized chemistry forms a durable barrier that protects against metal-to-metal contact.

  REDUCES OIL CONSUMPTION

  • Reduced oil consumption 61% in lab testing compared to three leading 10W-30/SAE 30 motor oils.¹
  • Heat-resistant synthetic base oils provide low volatility, excellent viscosity stability and strong oxidation resistance.
  • Helps engines run longer between top-offs, providing peace of mind they won’t fail due to oil starvation and will run dependably in the harshest conditions.

  FORMULATED FOR POWER

  • Prevents ring and valve sticking while helping eliminate carbon deposits..
  • Reduces piston-ring and cylinder wear for maximum engine compression.
  • Helps produce maximum power throughout their service lives, helping you get more work done.

  See the product data sheet for full details.

  ¹Based on 125-hour lab tests of small engines using AMSOIL 10W-30 Synthetic Small-Engine Oil and three leading 10W-30/SAE 30 motor oils.

• Technical Specifications

  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  

• Product Reviews

  5 star rating

  Based on 529 reviews

  Based on 529 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    WONDERFUL OIL!!
    By  BOSS,  a  Verified Buyer  from  Georgia   on  November 11, 2026

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    This Oil has my Generator, Pressure Washer, my Ariens Apex zero turn lawnmower and my 25 year old Craftsman riding mower running smooth as silk!! Phenomenal Oil!! I expected nothing less from Amsoil! Simply the Best!!
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Lawn Equipment Must
    By  RYAN,  a  Verified Buyer  from  Sarnia Ontario  on  October 30, 2026

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    I have and use Honda gas power equipment for my home and lawn. Recently went to this oil over the Honda branded conventional oil and really like how the machines are running on it. Ams doesn't disappoint
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Good for power generators
    By  RAMSES,  a  Verified Buyer  from  Chicago  on  October 25, 2026

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    Much better choice than using engine oil, generator runs quieter.
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    Simplifying my life.
    By  PAUL,  a  Verified Buyer  from  Green Bay  on  October 23, 2026

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    I have been and are currently using the Commmercial Grade 10w40 in all of my outdoor equipment ( with the exception of the snowblowers ) for quite some time now. I've noticed the engines run cooler and the oil seems cleaner ( I change at 100 hour intervals ) .No more dealing with the different weight and viscocity oils again. I run full synthetic in everything I own. I wont be going back to regular oil again.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Back ordered filter
    By  GEORGE,  a  Verified Buyer  on  October 18, 2026

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    I ordered 2 qts of oil for my hustler zero turn mower but the Amsoil filter was out of stock. I wish you would’ve still placed it on my order in a back order status and ship when it finally comes in.
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    Full synthetic
    By  KARL,  a  Verified Buyer  from  Pennsylvania   on  October 18, 2026

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    My lawnmower loves it
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Older equipment
    By  RICK,  a  Verified Buyer  from  Osceola   on  October 18, 2026

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    My lawn mower, snowblower, and my 1996 Wheelhorse have only Amsoil in them. I use Amsoil 2 stroke oil in my weed whip. That's a Tanaka brand and I don’t remember when they stopped making this one.
    Bottom Line

    Yes, I would recommend this to a friend.
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  • 5 star rating
    Small Engine oil
    By  JAMES A,  a  Verified Buyer  on  October 18, 2026

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    I've been using for years. it has amazing engine protection and well worth the money spent.
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    Great for Lawn Equipment
    By  Bry,  a  Verified Buyer  from  Hot Oklahoma  on  October 16, 2026

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    I used to change oil every season as the oil would be black and evaporate enough that it was no longer on the dipstick. Now I can go two seasons between oil changes and the oil still looks pretty good and still registers on the dipstick. Really opened my eyes to how good Amsoil is and now I won't use anything else.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    A must have for generators!
    By  Evil Twin,  a  Verified Buyer  from  Virginia   on  October 10, 2026

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    After the break in period, I switched to the Amsoil 5w30 for the home generator. Although we only put 30- 40 hours a year in it, there is zero oil consumption. No issues starting down to 0*f in the dead of winter.
    Bottom Line

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

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• Highlights

  • Protects up to 200 hours
  • Helps extend engine life
  • Rust-inhibited
  • Maximizes engine power
  • Helps cut maintenance costs

• 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

  AMSOIL 5W-30 100% Synthetic Small-Engine Oil
  Delivers commercial-grade protection and outperforms conventional oils. Tough formulation protects against wear, heat and carbon deposits. Helps maintain power and promotes long engine life. Specifically designed for maximum equipment dependability. Service life up to 200 hours.

  See the product data sheet for full details.

  EXCELLENT WEAR PROTECTION

  • Shear-stable, high-film-strength formulation fortified with anti-wear additives.
  • Does not thin out due to mechanical shear, ensuring a thick lubricating film for maximum wear protection.
  • Specialized chemistry forms a durable barrier that protects against metal-to-metal contact.

  REDUCES OIL CONSUMPTION

  • Reduced oil consumption 61% in lab testing compared to three leading 10W-30/SAE 30 motor oils.¹
  • Heat-resistant synthetic base oils provide low volatility, excellent viscosity stability and strong oxidation resistance.
  • Helps engines run longer between top-offs, providing peace of mind they won’t fail due to oil starvation and will run dependably in the harshest conditions.

  FORMULATED FOR POWER

  • Prevents ring and valve sticking while helping eliminate carbon deposits..
  • Reduces piston-ring and cylinder wear for maximum engine compression.
  • Helps produce maximum power throughout their service lives, helping you get more work done.

  See the product data sheet for full details.

  ¹Based on 125-hour lab tests of small engines using AMSOIL 10W-30 Synthetic Small-Engine Oil and three leading 10W-30/SAE 30 motor oils.

• Technical Specifications

  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  

• Product Reviews

  5 star rating

  Based on 529 reviews

  Based on 529 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    WONDERFUL OIL!!
    By  BOSS,  a  Verified Buyer  from  Georgia   on  November 11, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    This Oil has my Generator, Pressure Washer, my Ariens Apex zero turn lawnmower and my 25 year old Craftsman riding mower running smooth as silk!! Phenomenal Oil!! I expected nothing less from Amsoil! Simply the Best!!
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Lawn Equipment Must
    By  RYAN,  a  Verified Buyer  from  Sarnia Ontario  on  October 30, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I have and use Honda gas power equipment for my home and lawn. Recently went to this oil over the Honda branded conventional oil and really like how the machines are running on it. Ams doesn't disappoint
    Bottom Line

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

    YES (2) NO (0)
  • 5 star rating
    Good for power generators
    By  RAMSES,  a  Verified Buyer  from  Chicago  on  October 25, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    Much better choice than using engine oil, generator runs quieter.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Simplifying my life.
    By  PAUL,  a  Verified Buyer  from  Green Bay  on  October 23, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I have been and are currently using the Commmercial Grade 10w40 in all of my outdoor equipment ( with the exception of the snowblowers ) for quite some time now. I've noticed the engines run cooler and the oil seems cleaner ( I change at 100 hour intervals ) .No more dealing with the different weight and viscocity oils again. I run full synthetic in everything I own. I wont be going back to regular oil again.
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Back ordered filter
    By  GEORGE,  a  Verified Buyer  on  October 18, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I ordered 2 qts of oil for my hustler zero turn mower but the Amsoil filter was out of stock. I wish you would’ve still placed it on my order in a back order status and ship when it finally comes in.
    Bottom Line

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

    YES (0) NO (1)
  • 5 star rating
    Full synthetic
    By  KARL,  a  Verified Buyer  from  Pennsylvania   on  October 18, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    My lawnmower loves it
    Bottom Line

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

    YES (1) NO (0)
  • 5 star rating
    Older equipment
    By  RICK,  a  Verified Buyer  from  Osceola   on  October 18, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    My lawn mower, snowblower, and my 1996 Wheelhorse have only Amsoil in them. I use Amsoil 2 stroke oil in my weed whip. That's a Tanaka brand and I don’t remember when they stopped making this one.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Small Engine oil
    By  JAMES A,  a  Verified Buyer  on  October 18, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I've been using for years. it has amazing engine protection and well worth the money spent.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Great for Lawn Equipment
    By  Bry,  a  Verified Buyer  from  Hot Oklahoma  on  October 16, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    I used to change oil every season as the oil would be black and evaporate enough that it was no longer on the dipstick. Now I can go two seasons between oil changes and the oil still looks pretty good and still registers on the dipstick. Really opened my eyes to how good Amsoil is and now I won't use anything else.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    A must have for generators!
    By  Evil Twin,  a  Verified Buyer  from  Virginia   on  October 10, 2026

    Open report issue form

    Describe the issue

    Failed to verify captcha

    Cancel Submit
    After the break in period, I switched to the Amsoil 5w30 for the home generator. Although we only put 30- 40 hours a year in it, there is zero oil consumption. No issues starting down to 0*f in the dead of winter.
    Bottom Line

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

    YES (0) NO (0)