Diesel Gard 10W-40 CK-4
A semi-synthetic low SAPS stay-in-grade high-performance diesel engine oil for normally aspirated, or turbocharged, highly rated diesel engines. Why choose this oil
- ACEA E7/E11
- API CK-4/SN
- Cummins CES 20086
- Detroit Diesel 93K222
- Deutz DQC-III-18 LA
- MTU Type 2.1
- Mack EOS-4.5
- MAN M3775
- MB 228.31
- Renault Trucks RLD-4
- Volvo VDS-4.5
Why choose Diesel Gard 10W-40 CK-4
Duckhams Diesel Gard 10W-40 CK-4 is a semi-synthetic low SAPS stay-in-grade high-performance Diesel Engine Oil designed to be used in normally aspirated, or turbocharged, highly rated diesel engines, including those utilising Exhaust Gas Recirculation (EGR) systems, meeting Euro VI emissions standards operating under severe conditions, including extended oil drain intervals. Backward compatible and suitable for use in older Euro I, II, III, IV and V engines requiring a lubricant of this viscosity and performance level. Suitable for use in engines fitted with Selective Catalytic Reduction (SCR/AdBlue) NOx reduction systems, Exhaust Gas Recirculation (EGR) systems, or Diesel Oxidation Catalysts (DOC) and for use in vehicles fitted with Diesel Particulate Filters (DPFs). Exceeds API CK-4 performance, designed for premium OEM fleet applications.
- Low sulphated ash, phosphorus and sulphur (SAPS) additive technology, designed to be compatible with and extend the life of: Diesel Particulate Filters (DPFs), Selective Catalytic Reduction (SCR/AdBlue), and Diesel Oxidation Catalysts (DOCs) aftertreatment devices, reducing downtime and maintaining continuous compliance with the latest emissions standards.
- Excellent deposit control minimises soot-related wear, and prevents oil thickening, maintaining oil viscosity and ensuring that the oil continues to lubricate throughout the manufacturer's recommended oil drain interval, extending engine life.
- Formulated using the latest detergent technology ensuring exceptional cleanliness, notably on pistons and minimising deposit and sludge formation, and reducing bore polishing. Maintains continued engine performance and extends component, and engine, life.
- Unrivalled effective TBN neutralises acids, formed by combustion, reducing corrosive wear throughout the manufacturer's recommended oil drain, extending engine life.
- Excellent oxidative and thermal stability, enhanced by semi-synthetic oil technology, prevents oil thickening and helps maintain appropriate viscosity, lubricant performance and fuel economy throughout the manufacturer's recommended oil drain interval.
Typical physical characteristics
| Property | Unit | Typical Value |
|---|---|---|
| Viscosity Grade | 10W-40 | |
| Viscosity @ 100 °C | cSt | 15.72 |
| Viscosity @ 40 °C | cSt | 108.4 |
| Viscosity Index | 154 | |
| CCS @ -25 °C | cP | 6,039 |
| Total Base Number | mgKOH/g | 9.7 |
| Flash Point (Closed Cup) | °C | 208 |
| Pour Point | °C | -39 |
| Density @ 15 °C | kg/L | 0.8682 |
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 10W-40 CK-4 is recommended for, grouped by the marque that sets them rather than by the code.
Mercedes-Benz
- MB 228.31
Renault
- Trucks RLD-4
Volvo
- VDS-4.5



