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AMSOIL 10W-40 100% Synthetic Small-Engine Oil

Product code : ASFQT-EA

5 star rating Read 499 reviews

Customer Rating

5

91% would recommend

  • 5 483
  • 4 14
  • 3 1
  • 2 1
  • 1 0

AMSOIL 10W-40 100% Synthetic Small-Engine Oil

5 star rating Based on 499 reviews
  • 5 star rating
    Small engine 10w-40
    By  CHRIS,  a  Verified Buyer  from  Maryland   on  August 23, 2025
    Since I use amsoil in everything else I own I decided to switch my zero turn mower over too. I ordered 2 quarts for my lawn mower and 2 quarts for my generator and they shipped it for free. Love the free shipping!!!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Its more than oil- somehow
    By  Alex C,  a  Verified Buyer  from  Milwaukee  on  August 18, 2025
    Ok - so lets start off by saying the mower this is about had its first oil change using name brand oil … it was amsoil. Just because it sounded cool on an impulse buy. So now the part that matters. We noticed immediate differences right away. It was waaayyyyy easier to start. The mower ran smoother. I could hit whatever i felt like. I just couldn’t kill the mower. It just kept kicking ass for another 30 min on the tank too. I have no idea how this stuff slams so hard on dollar store oil. I’m glad i bought a lifetime supply. That gallon jug is a keeper. And the stickers on the mower? Hell ya. My neighbors electric mower? Idk i cant hear it. It feels like winning.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great Oil
    By  AL,  a  Verified Buyer  from  Ruston, La  on  August 05, 2025
    I’ve been using this oil for years in my mowers and side by side, this purchase was for a neighbor that still had break-in oil in his mower
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Back To Life
    By  Dinosaur,  a  Verified Buyer  on  July 30, 2025
    Did a flush with this oil and refilled my old mower. Decided not to throw out the mower since it made it run stronger and better than before.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good stuff
    By  GUY,  a  Verified Buyer  on  July 20, 2025
    It works great
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Oil for Generators
    By  ADRIAN,  a  Verified Buyer  from  California  on  July 16, 2025
    I have been using this oil exclusively since last year in my generators. It stays cleaner and lasts longer than the oil I was previously using. I love the protection it gives.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Outstanding product
    By  GILLES,  a  Verified Buyer  from  Gatineau   on  July 10, 2025
    A must have in your garage.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 4 star rating
    Small engine oil
    By  Samurai ,  a  Verified Buyer  on  July 10, 2025
    I have used this oil in my small engines, seems to do well. The price point could be better.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Hurricane season ready
    By  Jay,  a  Verified Buyer  from  South Florida  on  July 09, 2025
    Had to pick some oil up for hurricane season. Air-cooled generators work hard in the south.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good as advertised
    By  CHRIS,  a  Verified Buyer  from  NC  on  July 08, 2025
    Arrived as scheduled. Oil looks great and has a smoother texture than standard oil. Lawn mower & generator seemingly run better.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    10w-40
    By  MATTHEW,  a  Verified Buyer  on  July 06, 2025
    Great oil. Never use any other brand. Thanks AMSOIL!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Snow blower oil
    By  PHIL,  a  Verified Buyer  from  Ontario   on  July 02, 2025
    I use this motor on my fleet of Honda snowblowers. Very easy starting in extremely cold weather Highly recommend
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great for extreme service lawn equipment.
    By  JEFFERY,  a  Verified Buyer  from  Michigan  on  July 01, 2025
    Great Product for commercial lawn equipment.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Been using in riding mower since 2016
    By  ELH,  a  Verified Buyer  from  Lenoir NC  on  July 01, 2025
    Overall been using AMSOIL for everything since 2004. Have not had a single engine burn oil or break due to mechanical reasons. Purchased my riding mower with Kohler engine new in 2016. Been using small engine oil 10w-30 since new. Engine Still works great and does not burn any oil between oil and filter changes.
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  • 5 star rating
    Zeroturn mower
    By  DOUG,  a  Verified Buyer  from  Stilwell  on  June 27, 2025
    I have a Honda engine powered Zero turn with approximately 1200 hours. It was purchased 4-26-2003. I have been using this oil for about 10 years. I use no oil between oil changes. There is no smoke on start-up or while running while mowing. I haven't sent oil sample to be tested because I don't see any kind of wear issues. The next door neighbor is now using it in their new Z-turn mower with a Kawasaki engine. I am very happy with this oil and highly recommend it!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Absolutely amazing!
    By  GEORGE,  a  Verified Buyer  from  Taylorsville, ky  on  June 25, 2025
    So I ordered this and the filter for my 3 year old cub cadet zt1 50 with kawasaki fr691v engine. After this, no more smoke, ive noticed a literal temperature drop (thermal gun) and it just sounds better overall. Couldn't be happier.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Must Have OIl for Small engines
    By  PaulRapid,  a  Verified Buyer  from  WV  on  June 22, 2025
    The top engine rebuilder's said this is the Oil with zinc for the air cooled engines. These engines , air cooled need zinc! I use this oil in all 15 of my Gravely Kohler , Vnaguard and Onan engines - they work hard summer and winter!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    10/40 Small Engine Oil
    By  JOHN,  a  Verified Buyer  from  Virginia   on  June 13, 2025
    It was a very simple process to order from my phone and got the product when expected will be a repeat customer
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Very good product
    By  WADE,  a  Verified Buyer  from  AL  on  June 07, 2025
    I have full faith in Amsoil products!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best oil
    By  RICKY,  a  Verified Buyer  from  Colorado   on  June 04, 2025
    I run this in all my lawnmower’s and I’ve never had an issue with them
    Bottom Line
    Yes, I would recommend this to a friend.
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