Description of Diesel Engine Oil
Diesel engine oil (also known as diesel motor oil or heavy-duty engine oil) is a specialized lubricant formulated for diesel engines used in trucks, buses, construction equipment, generators, marine vessels, and some passenger vehicles (e.g., diesel pickup trucks).
Unlike gasoline engine oils, diesel engine oils are designed to handle higher compression ratios, greater thermal stress, higher soot loads, and longer oil change intervals typical in diesel operation.
Key Characteristics of Diesel Engine Oil
| Property | Description |
|---|---|
| Base Oil | Mineral (Group I/II), semi-synthetic, or full synthetic (PAO/ester-based) |
| Viscosity Grades | Common: 15W-40, 10W-30, 5W-40, 5W-30 (SAE grades) |
| API Service Categories | CK-4, CJ-4, CI-4 Plus, CH-4 (current: API CK-4 or FA-4) |
| ACEA Ratings (Europe) | E6, E7, E9 (for heavy-duty diesels) |
| OEM Approvals | Cummins CES 20081/86, Volvo VDS-4.5, Mack EO-S 4.5, Detroit Diesel DFS 93K222, etc. |
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