Sinclair Full Synthetic Heavy Duty Diesel Engine Oil

Heavy Duty Engine Oil

Full Synthetic Heavy Duty Diesel Engine Oil

Sinclair Full Synthetic Heavy-Duty Diesel Engine Oil is specifically formulated to give you optimal protection and performance from our most advanced technology.

Built for the Engines They're Building Today

Today’s engine designs have progressed and put new demands on engine oil, as OEMs increase horsepower and engine heat, reduced emissions, and increase fuel economy. Sinclair Heavy Duty Diesel Engine Oil has progressed as well. It takes the most advance engine oils to meet the demands of balancing durability, extending drain intervals, and protecting emissions control devices, and Sinclair delivers performance you’ll notice.

Heavy-Duty Protection

Sinclair Full Synthetic Heavy Duty Diesel Engine Oil gives outstanding protection and provides powerful, long-lasting, high-performing friction management and reduced metal-to-metal contact.

Sinclair Full Synthetic Heavy Duty Engine Oils: Performance You'll Notice

Our Full Synthetic oils have been specifically formulated and designed to provide:


  • Improved fuel economy. Reduces fuel costs without sacrificing engine protection and performance.
  • Extended oil drain intervals. Fuel economies can be gained when following engine manufacturer recommendations and in conjunction with scheduled oil analysis.


  • Enhanced friction reduction. Provides a very strong oil film to prevent metal-to-metal contact between rotating parts, delivering up to 53% better wear protection.1
  • Unsurpassed wear protection. The latest generation API CK-4 Sinclair engine oils provide increased protection against harmful engine and bearing wear due to cavitation, because they improve oil aeration.

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  • Better oxidation and deposit control. Stands up to high heat and stress to protect as well on the last day as it does on the first day. Up to 83% better oxidation control and 63% better deposit control.2
  • Provides added oxidation control and protection against acid buildup that can cause rust and corrosion.

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1 Using HD 10W-30 CK-4, compared to Conventional HD 15W-40 CK-4 during on-highway long-haul service. Savings will vary on idle time and other driving conditions of your fleet or vehicle.

2 Compared to new limits of API CK-4 requirements.

Typical Properties

Viscosity Grade Full Syn 5W-40 CK-4
Calcium, wt. % ASTM D5185 0.082
Cold Cranking Simulator at (°C), cP ASTM D5293 6535 (-30)
Color ASTM D1500 2.5
Flash Point °C ASTM D92 225
Flash Point °F ASTM D92 437
Gravity, °API ASTM D287 33.57
High Temperature / High Shear Vis at 150°C, cP ASTM D5481 3.5
Magnesium, wt. % ASTM D5185 0.116
Molybdenum, wt. % ASTM D5185 0.007
Nitrogen, wt. % ASTM D4629 0.124
Noack Volatility, % loss ASTM D6375 12
Phosphorus, wt. % ASTM D5185 0.115
Pour Point °C (°F) ASTM D5950 -45°C (-49°F)
Pumping Viscosity at (°C), cP ASTM D4684 24,113 (-35)
Specific Gravity @ 60°F (15.6°C) ASTM D4052 0.8572
Sulfated Ash, wt. % ASTM D874 0.99
Sulfur, wt. % ASTM D4951 0.314
TBN, mgKOH/g ASTM D2896 10
Viscosity @ 100°C cSt ASTM D445 14.76
Viscosity @ 40°C cSt ASTM D445 87.75
Viscosity Index ASTM D2270 177
Zinc, wt. % ASTM D5185 0.127

Industry/OEM Approvals

Title Full Syn 5W-40 CK-4
ACEA E9, E7, E4, E2 Meets Requirements
Allison C-4 Suitable for Use
API CI-4 Plus, CI-4, CH-4, CG-4, CF-2, CF Meets Requirements
API CJ-4 Meets Requirements
API CK-4 Approved
API SJ, SH, SG, SF Meets Requirements
API SL Meets Requirements
API SM Meets Requirements
API SN Approved
CAT ECF-3, ECF-2, ECF-1-a Meets Requirements
Chrysler/Fiat MS-10902 Meets Requirements
CID A-A-52306, MIL-PRF-2104G Meets Requirements
Cummins 20086 Meets Requirements
Cummins CES 20081, 20077, 20076 Meets Requirements
Detroit Diesel 93K218, 93K215, 93K214 Meets Requirements
Detroit Diesel 93K222 Meets Requirements
Ford WSS-M2C171-E Meets Requirements
Ford WSS-M2C171-F1 Approved
Global DHD-1 Meets Requirements
JASO DH-2 Meets Requirements
Mack EO-O Premium Plus, EO-N Premium Plus 03, EO-M Plus, and prior Meets Requirements
Mack EOS-4.5 Meets Requirements
MAN 3275, 270 Meets Requirements
MAN 3575 Meets Requirements
MB 228.3, 228.31 Meets Requirements
MTU 2.1 Meets Requirements
MTU Type I, Type II Meets Requirements
Renault RLD-4 Meets Requirements
Volvo VDS-4, 3, 2 Meets Requirements
Volvo VDS-4.5 Meets Requirements