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Valvoline offers several 15W-40 diesel engine oils, each with slightly varying specifications depending on the specific product line (e.g., Premium Blue, All-Fleet, Premium Plus). However, here's a general short specification that covers the common characteristics of Valvoline 15W-40 diesel engine oil: Valvoline 15W-40 Diesel Engine Oil: Short Specification Viscosity Grade: SAE 15W-40 (Multi-grade for year-round performance, offering good cold start flow and robust protection at high operating temperatures). API Service வகைகள்: Typically meets or exceeds various API diesel engine oil classifications, such as CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4. Some may also carry gasoline engine ratings like SN or SL. Key Features: Superior Wear Protection: Formulated with advanced additives to minimize friction and wear on critical engine components, extending engine life. Engine Cleanliness: Contains detergents and dispersants to control soot, sludge, and harmful deposit buildup, keeping the engine clean and efficient. Oxidation and Thermal Stability: Resists oil breakdown under high temperatures and prevents the formation of acids and sludge, maintaining lubricating properties over extended periods. Corrosion and Rust Protection: Protects engine parts from rust and corrosion, especially in humid or wet conditions. Extended Drain Intervals: Many Valvoline 15W-40 diesel oils are designed to support longer oil drain intervals, reducing maintenance costs and downtime. Soot Handling: Excellent soot dispersancy and control of oil thickening, crucial for modern diesel engines. Compatibility: Suitable for a wide range of heavy-duty diesel engines, including those with EGR (Exhaust Gas Recirculation) and DPF (Diesel Particulate Filter) technology (depending on the specific product). Applications: Heavy-duty diesel engines in commercial road transport (trucks, buses). Off-highway equipment (mining, construction, agricultural machinery). High-speed marine diesel engines. Generator sets. Mixed fleet applications (some formulations may also be suitable for gasoline and LPG engines). OEM Approvals/Recommendations (Examples, specific to product line): Cummins CES 20092, CES 20086, CES 20077/78 Mack EOS-4.5, EO-N, EO-M Plus Volvo VDS-4.5, VDS 3 Detroit Diesel DFS 93K222, DFS 93K218 Caterpillar ECF-3, ECF-2, ECF-1-a ACEA E9, E7 MB 228.31, 228.3 Renault VI RLD-3, RLD-2 Deutz DQC III-18LA, DQC III-10LA MTU Category 2.1, Type 2 JASO DH-2 Global DHD-1 For precise specifications, always refer to the official Valvoline product data sheet for the specific 15W-40 diesel engine oil product you are interested in, as formulations and approvals can vary. Sources