AMSOIL Synthetic 10W-40 Small Engine Oil (ASF)

AMSOIL Synthetic 10W-40 Small Engine OilA powerful formula designed for gasoline, liquid-propane, natural gas or diesel-powered utility engines.

AMSOIL Small Engine Oil package sizes include:
1-Quart Bottle (or buy case of 12)
5- US Gallon Pail
30-Gallon Drums
55-Gallon Drums
 

Wholesale Options

Oil Depot can offer wholesale programs so that you can buy AMSOIL Synthetic 10W-40 Small Engine Oil at the best prices in Canada or the United States. Request a synthetic oil price list using the contact form on this page.

Why Should Small Engine Oil Be Different Than Automotive Motor Oil?

Modern automotive motor oils have to be compatible with the sensitive emissions equipment found on today’s cars and trucks. As small engines do not have these emissions components, small engine motor oils have no such design constraints. Therefore AMSOIL can load this Synthetic 10W-40 Small Engine Oil with anti-wear and detergent ingredients that go far beyond those allowed in the latest car motor oils.

Suitable Applications for AMSOIL Synthetic 10W-40 Small Engine Oil

Ideal for utility engine brands such as Kubota, Kawasaki, Robin, Onan, Linamar and Vanguard.

  • Small gasoline or diesel engines
  • Lawn/garden equipment
  • Yard tractors
  • Zero-turn mowers
  • Tillers
  • Wood chippers
  • ATV/Side-by-side
  • Generators
  • Snow blowers
  • Water pumps
  • Mobile welders
  • Masonry equipment
  • Skid-steer loaders
  • Pressure washers
  • Log splitters

AMSOIL Synthetic 10W-40 Small Engine Oil can replace the following viscosities:

  • 5W-40
  • 10W-40
  • 15W-40
  • 20W-40
  • SAE 40

AMSOIL Synthetic 10W-40 Small Engine Oil is suitable for applications requiring the following specifications:

  • API SL, SJ, SH, SG (Small Gasoline Engine specifications)
  • API CD, CF (Small Diesel Engine specifications)
  • JASO MA/MA2 (Motorcycle/ATV/Side-by-Side, Wet Clutch)

Features and Benefits of AMSOIL Synthetic 10W-40 Small Engine Oil

  • Multi-functional- can be used in any type of 4-stroke utility engine
  • Can be used in gasoline, liquid-propane, natural gas or diesel-powered engines
  • Robust formula stands up to extreme heat and heavy loads
  • Designed for long service life
  • Minimizes oil usage
  • Excellent cold weather performance
  • Resists internal engine deposits for maximum performance
  • Wet-clutch compatible
  • Provides anti-rust protection for off-season storage

Designed For Long Service Intervals

Small engines used in commercial ventures see long hours and there may not be a lot of time for maintenance. AMSOIL considered this factor when designing this product. AMSOIL Synthetic 10W-40 Small Engine Oil protects engines that may not receive oil changes quite as often as they should. It offers plenty of reserve capacity in terms of wear control, detergency and shear stability.

AMSOIL Synthetic Small Engine Oil PistonResists Thinning Out

AMSOIL Synthetic 10W-40 Small Engine Oil is designed maintain its viscosity when exposed to extreme loads and hot operating conditions. It is highly resistant to thinning out or boiling off when pushed to the limit over many hours.

Less Oil Usage

AMSOIL Synthetic 10W-40 Small Engine Oil is less volatile and more shear resistant than regular engine oil. These factors reduce oil consumption to a minimum in mechanically sound engines. Testing proves that AMSOIL 10W-40 Small Engine Oil lowers oil consumption for up to 61% over leading small engine motor oils.

Fast Protection in Cold Weather

AMSOIL Synthetic 10W-40 Small Engine Oil has a cold-pour-point of -39°C (-38°F). This allows for fast oil flow to vital components in both splash- and pressure-lubed motors.

Rust Protection For Extended Storage

As small engines are often stored for long stretches, AMSOIL added powerful anti-rust/corrosion ingredients to this Synthetic 10W-40 Small Engine Oil. Bearings, cylinder bores, pistons, seals and valve-trains stay pristine over long storage periods. This AMSOIL formula protects engines in and out of service.

Suitable For Wet-Clutch and Transmission Use

AMSOIL Synthetic 10W-40 Small Engine Oil does not contain friction modifers. This makes it suitable wet-clutches and transmission use in ATVs, UTVs and Side-by-Sides.

Mixing AMSOIL Synthetic 10W-40 Small Engine Oil With Other Brands

AMSOIL Synthetic 10W-40 Small Engine Oil is compatible with all other brands of conventional, semi-synthetic and synthetic 4-stroke small engine oils. While you can safely mix AMSOIL Synthetic Oil with other brands, this will reduce the drain interval and performance capabilities of AMSOIL oil.

The use of any aftermarket oil additives is definitely NOT recommended.

Service Life for AMSOIL Synthetic 10W-40 Small Engine Oil

AMSOIL Synthetic 10W-40 Small Engine Oil can stay in service for up to one year or 200 hours of service (whichever comes first).

Specifications

AMSOIL Synthetic 10W-40 Small Engine Oil (ASF)
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)

14.5
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)

96.6
Viscosity Index (ASTM D-2270)

156
Pour Point °C (°F) (ASTM D-97)

-39 (-38)
Flash Point °C (°F) (ASTM D-92)

232 (450)
Fire Point °C (°F) (ASTM D-92)

252 (486)
Four Ball Wear Test
(ASTM D-4172B: 40 kg, 75°C, 1200 rpm, 1 hour), Scar, mm

0.45
Noack Volatility, % weight loss (g/100g) (ASTM D-5800)

3.7%
High Temperature/High Shear @ 150°C and 1.0 X 106 s-1, cP (ASTM D 4683), cP

4.4
Total Base Number

8.5