5W-40 Full Synthetic Heavy Duty Diesel Oil 55 Gallon Drum

Doc's Diesel Engine Oil:

Doc's Diesel 5W-40 Full Synthetic Heavy Duty Diesel Oil is designed for modern diesel engines, providing excellent wear protection and performance even in severe conditions. Suitable for both new emissions-compliant rigs and older engines, it features strong oxidation and viscosity control to reduce oil consumption and enhance durability. Made with premium synthetic base oils and advanced CK-4 specification additives, this oil ensures top performance across extreme operating conditions, including those with EGR and DPF emissions systems.

Product Details:

• Innovative Protection - Formulated for durability and reliability, this oil provides excellent oxidation and thermal stability, reducing harmful sludge and deposits in high-stress environments
• All-Weather Performance - Exceptional cold-start capability ensures ultra-low temperature pumpability, delivering fast flow and protection the moment you turn the key
• Extreme Load Stability - With stay-in-grade shear stability, 5W-40 maintains its viscosity under high heat and heavy loads, protecting critical engine components in severe service cycles like high-speed hauls or short-stop deliveries
• Engineered for Modern Emissions Standards - Optimized for 2017 GHG-compliant diesel engines, this formula supports lower CO₂ output and improved fuel economy while delivering endurance for both over-the-road and off-highway use
• Doc's 5W-40 Full Synthetic Diesel Oil Safety Sheet
• Doc's Auto Parts all have an OEM design, fit, and function that meet or exceed OEM Requirements

Doc's Part Number:

DOCS5W40-55G

Oil Capacity:

• 6.7L Cummins: 3.012 Gallons (12 Quarts)
• 6.7L Powerstroke: 3.25 Gallons (13 Quarts)
• 6.6L Duramax: 2.5 Gallons (10 Quarts)
• 3.0L Duramax: 1.75 Gallons (7 Quarts)
• 3.0L EcoDiesel: 2.65 Gallons (10.6 Quarts)

Change Interval:

Above all recommendations, change according to your vehicle’s manufacturer's warranty.

• Standard Service (normal duty): Every 10,000 – 15,000 miles maximum, or as recommended by OEM
• Severe Service (heavy loads, towing, dusty or extreme conditions): Every 7,500 – 10,000 miles maximum
• Off-Road / Agricultural / Equipment: Follow manufacturer guidelines (typically 250 – 500 hours)