Chevron Delo® 400 SDE 15W-40 CK-4 Diesel Engine Oil is a premium heavy-duty engine oil designed with ISOSYN® Advanced Technology to deliver reliable protection, extended service life, and performance for modern diesel engines. Meeting the latest API CK-4 specification, this oil provides superior wear protection, oxidation stability, and deposit control, ensuring engines run cleaner and last longer.

Engineered for on-highway fleets, trucks, and buses, it is also fully compatible with older engines, making it a versatile choice for mixed fleets. Key benefits include:

• Outstanding wear protection for critical engine parts under high loads

• Improved oxidation resistance to extend oil life and reduce downtime

• Excellent shear stability to maintain viscosity in severe duty cycles

• Backwards compatibility with earlier API categories for older equipment

• OEM approvals from leading engine manufacturers for confidence in performance

The 3/1 gallon case packaging provides convenience for fleet operators, service shops, and individual diesel vehicle owners needing a reliable mid-size bulk option. Suitable for on-road trucks, agricultural machinery, and construction vehicles, Chevron Delo 400 SDE ensures long-lasting performance and engine durability.