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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:

Performance

  • 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.

Strength

  • 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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Durability

  • 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
Viscosity GradeCalcium, wt. % ASTM D5185 Full Syn 5W-40 CK-40.082
Viscosity GradeCold Cranking Simulator at (°C), cP ASTM D5293 Full Syn 5W-40 CK-46535 (-30)
Viscosity GradeColor ASTM D1500 Full Syn 5W-40 CK-42.5
Viscosity GradeFlash Point °C ASTM D92 Full Syn 5W-40 CK-4225
Viscosity GradeFlash Point °F ASTM D92 Full Syn 5W-40 CK-4437
Viscosity GradeGravity, °API ASTM D287 Full Syn 5W-40 CK-433.57
Viscosity GradeHigh Temperature / High Shear Vis at 150°C, cP ASTM D5481 Full Syn 5W-40 CK-43.5
Viscosity GradeMagnesium, wt. % ASTM D5185 Full Syn 5W-40 CK-40.116
Viscosity GradeMolybdenum, wt. % ASTM D5185 Full Syn 5W-40 CK-40.007
Viscosity GradeNitrogen, wt. % ASTM D4629 Full Syn 5W-40 CK-40.124
Viscosity GradeNoack Volatility, % loss ASTM D6375 Full Syn 5W-40 CK-412
Viscosity GradePhosphorus, wt. % ASTM D5185 Full Syn 5W-40 CK-40.115
Viscosity GradePour Point °C (°F) ASTM D5950 Full Syn 5W-40 CK-4-45°C (-49°F)
Viscosity GradePumping Viscosity at (°C), cP ASTM D4684 Full Syn 5W-40 CK-424,113 (-35)
Viscosity GradeSpecific Gravity @ 60°F (15.6°C) ASTM D4052 Full Syn 5W-40 CK-40.8572
Viscosity GradeSulfated Ash, wt. % ASTM D874 Full Syn 5W-40 CK-40.99
Viscosity GradeSulfur, wt. % ASTM D4951 Full Syn 5W-40 CK-40.314
Viscosity GradeTBN, mgKOH/g ASTM D2896 Full Syn 5W-40 CK-410
Viscosity GradeViscosity @ 100°C cSt ASTM D445 Full Syn 5W-40 CK-414.76
Viscosity GradeViscosity @ 40°C cSt ASTM D445 Full Syn 5W-40 CK-487.75
Viscosity GradeViscosity Index ASTM D2270 Full Syn 5W-40 CK-4177
Viscosity GradeZinc, wt. % ASTM D5185 Full Syn 5W-40 CK-40.127

Industry/OEM Approvals

Title Full Syn 5W-40 CK-4
Viscosity GradeACEA E9, E7, E4, E2 Meets Requirements
Viscosity GradeAllison C-4 Suitable for Use
Viscosity GradeAPI CI-4 Plus, CI-4, CH-4, CG-4, CF-2, CF Meets Requirements
Viscosity GradeAPI CJ-4 Meets Requirements
Viscosity GradeAPI CK-4 Approved
Viscosity GradeAPI SJ, SH, SG, SF Meets Requirements
Viscosity GradeAPI SL Meets Requirements
Viscosity GradeAPI SM Meets Requirements
Viscosity GradeAPI SN Approved
Viscosity GradeCAT ECF-3, ECF-2, ECF-1-a Meets Requirements
Viscosity GradeChrysler/Fiat MS-10902 Meets Requirements
Viscosity GradeCID A-A-52306, MIL-PRF-2104G Meets Requirements
Viscosity GradeCummins 20086 Meets Requirements
Viscosity GradeCummins CES 20081, 20077, 20076 Meets Requirements
Viscosity GradeDetroit Diesel 93K218, 93K215, 93K214 Meets Requirements
Viscosity GradeDetroit Diesel 93K222 Meets Requirements
Viscosity GradeFord WSS-M2C171-E Meets Requirements
Viscosity GradeFord WSS-M2C171-F1 Approved
Viscosity GradeGlobal DHD-1 Meets Requirements
Viscosity GradeJASO DH-2 Meets Requirements
Viscosity GradeMack EO-O Premium Plus, EO-N Premium Plus 03, EO-M Plus, and prior Meets Requirements
Viscosity GradeMack EOS-4.5 Meets Requirements
Viscosity GradeMAN 3275, 270 Meets Requirements
Viscosity GradeMAN 3575 Meets Requirements
Viscosity GradeMB 228.3, 228.31 Meets Requirements
Viscosity GradeMTU 2.1 Meets Requirements
Viscosity GradeMTU Type I, Type II Meets Requirements
Viscosity GradeRenault RLD-4 Meets Requirements
Viscosity GradeVolvo VDS-4, 3, 2 Meets Requirements
Viscosity GradeVolvo VDS-4.5 Meets Requirements

Information accurate as of April 4, 2025