- Heavy-duty diesel
SAE 15W-40
Low-ash full synthetic heavy-duty diesel engine oil for after-treatment systems, API CK-4
ViscositySAE
Recommended for
Same grade SAE 5W-40 · Heavy-duty diesel
Same grade SAE 5W-40 · Cars
Same grade SAE 5W-40 · High-speed marine
Business customers only. We sell wholesale, invoiced to registered companies.
Official approval
Detroit Fluids Specification 93K218
Detroit Diesel's engine oil specification at API CJ-4 level, for engines with a particulate filter, with capped sulphated ash.
Official approval
Detroit Fluids Specification 93K222
Detroit Diesel's current heavy-duty diesel engine oil specification, at API CK-4 level, with increased oxidation and aeration requirements.
Official approval
Mack EOS-4.5 — heavy-duty diesel engine oil
Mack's engine oil specification matching the API CK-4 level, for Mack and Volvo trucks with exhaust aftertreatment.
Official approval
MTU Oil Category 2.1 (low SAPS)
The low-ash form of MTU category 2: a multigrade oil with under 1 % ash, approved only where the fuel carries less than 50 mg/kg sulphur.
Derived from the vehicle makers' approvals this product meets. Check the specification your vehicle's manual requires.
| Property | Typical value | Method |
|---|---|---|
| Kinematic viscosity @ 40 Cmm2/s | 84 | ASTM D445 |
| Kinematic viscosity @ 100 Cmm2/s | 13.8 | ASTM D445 |
| Cold-Cranking Simulator, Apparent Viscosity @ -30 CmPa.s | 6510 | ASTM D5293 |
| Mini-Rotary Viscometer, Apparent Viscosity, -35 CmPa.s | 16800 | ASTM D4684 |
| Hi-Temp Hi-Shear Viscosity @ 150 C 1x10(6) sec(-1)mPa.s | 3.8 | ASTM D4683 |
| Viscosity index | 169 | ASTM D2270 |
| Ash, Sulfated, mass% | 1 | ASTM D874 |
| Total base numbermgKOH/g | 12 | ASTM D2896 |
| Pour point°C | -48 | ASTM D97 |
| Flash point, Cleveland Open Cup°C | 233 | ASTM D92 |

Mobil Delvac Ultra 5W-40 Ultimate Protection v1 is an ultimate full synthetic high performance heavy duty diesel engine oil with a low ash formula that helps extend engine life while providing long drain capability and potential fuel economy for modern and latest diesel engine technology operating in severe applications. It delivers exceptional performance in the latest, modern and older, hardworking engines, including those with emission control systems, and is recommended for a wide range of heavy-duty applications in on-road transport and off-road mining, forestry, construction and agricultural industries. Developed to maintain unsurpassed oxidation stability while delivering exceptional low-temperature fluidity and pumpability for smooth starting down to -35°C, its sophisticated additive system ensures exceptional engine wear performance and supports long engine life. The low-ash formulation protects exhaust after-treatment devices, and advanced engine cleanliness performance prevents deposits, keeping the engine running efficiently for longer. Key features include excellent low-temperature pumpability, step-out wear protection, unsurpassed oxidation stability, superb corrosion resistance and an expertly formulated low-viscosity formulation for fuel economy potential. Recommended for the most sophisticated high-performance diesel engines with turbo-charger, direct injection and low-emission designs and all types of exhaust after-treatment technology, for on- and off-highway use, high-performance gasoline engines and mixed fleets. SAE 5W-40, it carries approvals including Detroit Fluids Specification 93K218 and 93K222, MACK EOS-4.5, MTU Oil Category 2.1, VOLVO VDS-4.5, RENAULT TRUCKS RLD-3, Cummins CES 20081/20086 and DEUTZ DQC IV-18 LA, and meets or exceeds API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4, SM, SN, SL, JASO DH-2, Caterpillar ECF-3, ACEA E7/E11 and ISUZU DEO (w/ DPD equipped vehicles).
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