Valvoline 909766 Heavy Duty Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon (Case of 3)

Valvoline 909766 Heavy Duty Synthetic Blend 15W-40 Diesel Engine Oil is purpose-built for the most demanding diesel applications. Sold as a convenient case of three 1-gallon jugs, this oil is engineered with targeted additive technology for engines operating under extreme duty cycles or severe environmental contamination conditions — from farm and construction equipment to on-highway fleets.

This synthetic blend formulation delivers proven protection against wear, deposits, and oil breakdown while providing enhanced viscosity and oxidation stability for extended oil life. Whether running Cummins, Volvo, Mack, Ford, Caterpillar, or Detroit Diesel engines, this oil is designed for reliable year-round performance regardless of weather conditions.

Key Features:

• Synthetic Blend Formula: Combines synthetic and conventional base oils with advanced additive technology for superior protection over conventional oils
• Wear Protection: Engineered to control engine wear, deposits, and oil breakdown in high-stress operating environments
• Enhanced Oxidation Stability: Maintains viscosity and resists breakdown under extreme heat and heavy loads
• Broad OEM Approval: Approved and recommended for Cummins, Volvo, Mack, Ford, Caterpillar, Detroit Diesel, and more
• API Certified: Meets or exceeds API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4, and SN service categories
• Wide Application Range: Suitable for construction equipment, on-highway fleets, agricultural machinery, and heavy hauling
• Case of 3: Includes three 1-gallon jugs (3 gallons total) for shop or fleet convenience

Valvoline 909766 is the trusted synthetic blend choice for fleet operators and heavy equipment professionals who need dependable diesel engine protection without the cost of full synthetic. Part number 909766.