Diesel Gard 15W-40 CI-4
A premium mineral-based heavy-duty diesel engine oil formulated to deliver reliable performance in turbocharged and naturally aspirated engines. Why choose this oil
- API CI-4 (licensed)
- ACEA E7
- DTFR 15B110 (MB 228.3)
- Cummins CES 20077/78
- MAN M3275-1
- Caterpillar ECF 1a
- DDC 93K215
- Deutz DQC III-10
- Volvo VDS-3
- Renault RLD-2
- Mack EO-N
- Volvo VDS-3
- Renault RLD-2
- Mack EO-N
Why choose Diesel Gard 15W-40 CI-4
Duckhams Diesel Gard 15W-40 CI-4 is a premium mineral-based heavy-duty diesel engine oil formulated to deliver reliable performance in turbocharged and naturally aspirated engines. Designed to meet the requirements of API CI-4 and Mercedes-Benz 228.3, it provides excellent protection against wear, deposits and oil oxidation. It supports extended oil drain intervals and maintains engine cleanliness even under high-load, high-temperature operation. Ideal for commercial fleets, long-haul trucks and off-road equipment, it ensures consistent performance and long-term engine durability. May also be suitable for other vehicles. Please refer to the owner's handbook and the product specification shown.
- Suitable for a wide range of climates and operating conditions.
- Excellent flow at low temperatures, ensuring quick engine lubrication.
- Strong acid-neutralising capacity for extended engine cleanliness.
- High resistance to thermal breakdown, even under heavy loads.
- Maintains viscosity and performance over long service intervals.
Typical physical characteristics
| Property | Unit | Typical Value |
|---|---|---|
| SAE Viscosity Grade | 15W-40 | |
| Density @ 20 °C | kg/L | 0.8724 |
| Viscosity @ 100 °C | cSt | 15.1 |
| Viscosity @ 40 °C | cSt | 118 |
| Viscosity Index | 131 | |
| CCS @ -20 °C | cP | 6,850 |
| Total Base Number | mgKOH/g | 10.1 |
| Sulphated Ash | % wt | 1.4 |
| Flash Point (COC) | °C | 224 |
| Pour Point | °C | -30 |
Typical physical characteristics are provided as an indication of properties based on current production data only, and should not be interpreted as a specification.
Manufacturer standards
The manufacturer standards Duckhams Diesel Gard 15W-40 CI-4 is recommended for, grouped by the marque that sets them rather than by the code.
Renault
- RLD-2
Volvo
- VDS-3



