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THE ORIGINAL BRITISH MOTOR OIL SINCE 1899
Commercial Vehicle OilsDiesel Gard Range

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

Viscosity15W-40
Oil TypeMineral
Specifications
  • 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
Approvals
  • Volvo VDS-3
  • Renault RLD-2
  • Mack EO-N
Available in

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

PropertyUnitTypical Value
SAE Viscosity Grade15W-40
Density @ 20 °Ckg/L0.8724
Viscosity @ 100 °CcSt15.1
Viscosity @ 40 °CcSt118
Viscosity Index131
CCS @ -20 °CcP6,850
Total Base NumbermgKOH/g10.1
Sulphated Ash% wt1.4
Flash Point (COC)°C224
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