AMSOIL Synthetic Blend 15W-40 Heavy Duty Motor Oil (PCO)

AMSOIL Synthetic Blend 15W-40 Heavy Duty Motor Oil (PCO) Cost Effective, High Quality

AMSOIL Synthetic Blend Diesel Oil

AMSOIL Synthetic Blend 15W-40 Heavy Duty Motor Oil (PCO) features a dual-base of premium synthetic and hydro-processed base oils in formulation with proven high quality anti-wear additives. This multi-use oil is designed for both heavy-duty diesel engines (including modern EGR units) and gasoline engines, combining versatility and heavy-duty engine protection into one cost effective motor oil. It is formulated with high levels of dispersant and detergent additives that effectively control acids and soot thickening to prevent corrosion, wear and deposits. AMSOIL Synthetic Blend 15W-40 Heavy Duty Motor Oil is excellent for all season use in on- or off-road applications.

Maximizes Fuel Economy, Minimizes Oil Consumption and Emissions

The synthetic base oil component in AMSOIL PCO reduces oil volatility (burn-off). Less make-up oil is required to replace volatilized oil and less oil vapor gets into the exhaust stream. Oil viscosity increase is controlled, which minimizes drag for better efficiency.

Improved Extreme Temperature Performance

Unlike other semi-synthetic oils, AMSOIL PCO contains a high content of quality synthetic oils for enhanced performance. Heat and oxidation resistance are improved for clean engine operation and long lasting engine oil service life. Dependable cold-temperature flow is assured for easier start-up and improved post start-up protection.

Bid Appropriate

AMSOIL Synthetic Blend 15W-40 fulfills the requirements of most public and private purchasing bids. It is API CI-4 Plus/SL, Detroit Diesel PowerGuard 93K214 and Mack EO-N Premium Plus '03 registered, making it ideal where these registrations are required.

  • Licensed specifications
  • Versatile for mixed fleets
  • Outstanding wear protection for heavy duty trucks
  • High TBN maximizes engine protection


AMSOIL Synthetic Blend 15W-40 Heavy Duty Motor Oil is recommended for diesel engines, gasoline engines and other applications that require any of the following worldwide specifications:

  • API CI-4+,CF, CF-2, SL
  • ACEA A3/B3, E2, E3, E5
  • Global DHD-1
  • JASO DH-1
  • Mack EO-N Premium Plus '03
  • DDC Power Guard 93K214
  • Caterpillar ECF-1-a, ECF-2
  • Cummins CES 20071, 20072, 20076, 20077, 20078
  • Volvo VDS-2, VDS-3
  • MB 228.1, 228.3, 229.1
  • MAN 271/3275
  • MTU Type 2


AMSOIL PCO is compatible with conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil life expectancy and reduce the performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed. Aftermarket oil additives are not recommended for use with AMSOIL motor oils.


AMSOIL Synthetic Blend 15W-40 Heavy Duty Motor Oil is recommended for use according to the longest service interval established by the engine, vehicle or equipment manufacturer. Drain intervals may be extended when monitored by oil analysis.

AMSOIL Ea and Donaldson Endurance full flow oil filters are designed for extended drain intervals. They stop smaller particles, have less restriction and last longer than regular filters. For best performance, use AMSOIL Ea or Donaldson Endurance oil filters.


This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS). An MSDS is available upon request at 715-392-7101 or on our website. Keep out of the reach of children. Don't pollute. Return used oil to collection centers.

Typical Technical Properties
AMSOIL Synthetic Blend 15W-40 Motor Oil (PCO)
Viscosity @ 100°C, cSt (ASTM D-445) 15.6
Viscosity @ 40°C, cSt (ASTM D-445) 114.9
Viscosity Index (ASTM D-2270) 144
VISC. CCS, cP (ASTM D-5293) 4677 (-20°C)
Flash Point °C (°F) (COC) (ASTM D-92) 232 (450)
Pour Point °C (°F) (COC) (ASTM D-97) -36 (-32)
NOACK (% weight loss) (ASTM D-5800) 9.4
Four Ball Wear, 75°C, 1200 rpm, 40kg, 1 hour (ASTM D-4172B) 0.35
Total Base Number 12.1
High Temperature/High Shear Viscosity (ASTM D-4683 @ 150°C, 1.0 X 106 s.-1), cP 4.4

We're now on Facebook! on Facebook

Buy at wholesale price!
Preferred Customers buy at dealer cost and save 25%!

Not sure which products to get for your vehicle? Use the Vehicle Lookup Guide.

AMSOIL Distributor Opportunities
Start your own home business based on a proven superior product. Very low startup costs.

Sell AMSOIL products in your shop or store. Click here for information on AMSOIL retail accounts.

Does your business purchase lubricants for its equipment? Click for information about AMSOIL commercial accounts! Extend your equipment's life and reduce costs!