15W-50 Synthetic Small Engine Oil

20W-50 small engine commercial synthetic motor oil

With Small Engine 20W-50 you can rest assured your engines are protected even during periods of extended use when there’s no time for scheduled maintenance. Solves problems that plague small engines, including wear, power loss, oil consumption, harmful carbon deposits and stuck rings and valves. I

Amsoil’s 15W-50 Synthetic Small Engine Oil

20W-50 small engine commercial synthetic motor oil

A newer product due to market demand (2021) AMSOIL new Small Engine 20W-50 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.

In case you didn’t know – engine dependability is vital to running a profitable business.  Our lab guys found that most small engine oils they tested are nothing more than re-labeled
automotive oils, which are formulated with fuel economy in mind, And assuming you have 6-quarts to keep the additives strong. You need durability form a single quart.  Compared to liquid-cooled automotive engines, small engines do indeed run hotter, operate under constant load at a constant speed while generating more oil-damaging contaminants. Not to mention, they suffer from neglected maintenance, exposed to dirt, rain, snow and other extremes.
And to add one more thing – mosty use 3 or less quarts – so they’re far tougher on oil that most people think.

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



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EXCELLENT Wear Protection for Commercial Gear

AMSOIL Synthetic 15W-50 Small-Engine Oil is a shear-stable, high-film-strength formulation
fortified with a heavy dose of zinc (yes you heard right – the Zinc you’ve been looking for) anti-wear additives. It does not thin out due to mechanical shear, ensuring a thick lubricating film. It forms a durable barrier that protects against metal-to-metal contact.

Let’s go over this again

  1. Shear-stable, high-film-strength formulation fortified with a heavy dose of zinc anti-wear additives.
  2. Does not thin out due to mechanical shear, ensuring a thick lubricating film for maximum wear protection. Your oil pressure/lubrication qualities remains consistent from start to finish.
  3. Zinc chemistry forms a durable barrier that protects against metal-to-metal contact. Small Engine shops won’t be seeing you!


  • 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.


  • 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.


AMSOIL Synthetic 20W-50 Small-Engine Oil is multi-functional and can be used in gasoline engines, off-road diesel engines and certain transmissions. It doesn’t contain friction modifiers and meets JASO
wet-clutch standards. It increases convenience and helps prevent misapplication.

Use the appropriate viscosity of AMSOIL Synthetic Small-Engine Oil in applications that require any of the following specifications:
• API SL, SJ, SH, SG… (Gasoline)
• API CD, CF (Diesel)
• JASO MA/MA2 (Wet Clutch)

Use 15W-50 Synthetic Small-Engine Oil in small engines found in (not limited to) mowers (zero-turn, riding, stand-on, push), generators, power washers and other equipment that requires
SAE 50, 10W-50 or 15W-50 motor oil.

COMPATIBILITY of the 20W-50 Small Engine Oil

AMSOIL Synthetic Small-Engine Oil is compatible with other synthetic and conventional motor oils. Adding other oils, however, will shorten the life expectancy of AMSOIL motor oils and reduce their performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed. Aftermarket oil additives are not recommended for use with AMSOIL Synthetic Small-Engine Oil.

SERVICE LIFE of the Commercial 20W-50 Small Engine Oil

AMSOIL Synthetic Small-Engine Oil is a long-life formulation that has repeatedly demonstrated its ability to safely exceed OEM drain intervals in the toughest conditions. Extensive severe-service testing proves its ability to provide service life of up to 200 hours or one year, whichever comes first. It provides an extra measure of protection when
equipment goes longer between oil changes than is recommended by the OEM. So as you can see it’s all pretty awesome.


AMSOIL Synthetic Small-Engine Oil is Warranty Secure, keeping your factory warranty intact.
AMSOIL Synthetic Small-Engine Oil is a high-performance replacement for vehicle manufacturer-branded products and is also
backed by the AMSOIL Limited Warranty. For details of the wake-up call warranty
visit AMSOIL.com/warrantysecure.


This product is not expected to cause health concerns when used for the intended applications and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available via the Internet at AMSOIL.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Recycle used oil and bottle. (How did we survive not having these warnings back ion the 50’s?)

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