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

Product code : ASFQT-EA

5 star rating
Read 47 reviews
Read 47 reviews

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

AMSOIL 10W-40 100% 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 a heavy dose of zinc anti-wear additives.
  • Does not thin out due to mechanical shear, ensuring a thick lubricating film for maximum wear protection.
  • Zinc 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 Specification

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

Data Bulletin

Warranty

SDS



Product Reviews

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

5 star rating
Based on 47 reviews
Based on 47 reviews
See all customer reviews
  • 5 star rating
    Excellent product
    By  James,  a  Verified Buyer  from  MN  on  May 07, 2024
    As stated in a previous review, all of my small engines are older with high hours and in my opinion this product will help them keep on chugging along for many more years. Service and delivery time are exceptional
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Toro SS5000 Timecutter Zero Turn
    By  ERIK,  a  Verified Buyer  from  Edmond, OK, US  on  May 03, 2024
    Have the Kawasaki engine. Replaced spark plugs filter and oil. Little oil smell or seen in exhaust. Works well this far.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    happy with oil
    By  DOUG,  a  Verified Buyer  on  April 23, 2024
    My Honda powered Z-turn mower has 1100 hours on it and doesn't use any oil.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Outstanding Oil for Mower
    By  RON,  a  Verified Buyer  from  SC  on  April 20, 2024
    This is the only oil I use or will ever use in my commercial mower. This unit is 12 years old and I have never had an lubrication related issue with it.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    GREAT OIL
    By  JOE,  a  Verified Buyer  from  STOCKTON CA  on  April 11, 2024
    THE BEST OIL VERY RELIABLE
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best oil ever used
    By  JOSEPH,  a  Verified Buyer  from  Swanton, Ohio  on  April 02, 2024
    Best oil ever I used in Golf carts and lawn mowers.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Quality oil
    By  DALE,  a  Verified Buyer  from  Picton, Ontario   on  March 29, 2024
    I use this grade in my commercial grade toro zero turn mowers. They run great, change oil every 100 hours
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Exactly what I needed!
    By  BILL,  a  Verified Buyer  from  Florida  on  December 15, 2023
    Bought this for use in newer Yamaha Drive2 QuieTech golf carts. This oil is designed for such engines - air-cooled, splash lubrication, and especially that they're driven hard (golf cart community with many carts set up for higher-than-stock max speeds). The earlier Drive generation carts had 10w-30 as the oil spec - the spec for the newer QuieTech carts went to 10w-40. I've heard or read nothing definitive about why Yamaha changed the spec. My "guesestimation" is that it's likely due to the QuieTech carts running a LOT hotter, likely due to all of the changes made to isolate and reduce the engine noise. Not much freely flowing fresh air comes through the engine compartment on these! I have had zero oil-related issues with the 10w-30 in the earlier carts - should experience the same with the newer carts using this oil!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Small Engine Oil
    By  Bill,  a  Verified Buyer  from  NE NC  on  December 14, 2023
    I started using this in all my small engines around the shop, and it does a good job of helping engine performance, it keeps the engines internals clean, and it gives me piece of mind that these smaller engines are protected. My old riding mower couldn't go 20 hrs before the oil was already starting to darken. It had 10 hrs on it when I sold it and looked new.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    The only oil to use
    By  ROBERT,  a  Verified Buyer  on  November 29, 2023
    Amsoil is the only oil product I use any of my oil needs. Superior quality.
    Bottom Line
    Yes, I would recommend this to a friend.
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