Heavy Duty Diesel Engines

Diesel Engine Oils (HDDEO)

Reliable Protection for Commercial Fleets, Mining, and Power Generation

Heavy-duty diesel engines work under extreme loads, long operating hours, and harsh conditions. To keep them performing at their best, LUBELINE™ supplies premium Heavy-Duty Diesel Engine Oils (HDDEO) from leading global brands like Shell, Fuchs, and Engen. Our oils are engineered to deliver superior protection, extended drain intervals, and maximum reliability for trucks, buses, mining equipment, and power generation systems such as diesel generators.

Common Grades of Heavy-Duty Diesel Engine Oils

Choosing the right oil grade is vital for optimal performance and engine life. LUBELINE™ offers a wide range of viscosity grades, including:

15W-40 – the most common grade, suitable for mixed fleets and general heavy-duty applications.
10W-30 – provides improved cold-start performance and better fuel economy.
5W-40 – synthetic grade for extreme temperature ranges and modern high-output engines.
20W-50 – used in older engines or applications requiring higher viscosity.

Our HDDEO range also includes API service categories such as CK-4, CJ-4, CI-4, and CH-4, ensuring compatibility with modern emission systems (EGR, DPF, and SCR technologies).

Applications of HDDEO

LUBELINE™ Heavy-Duty Diesel Engine Oils are formulated to perform across diverse industries and applications:

On-road fleets – trucks, buses, and delivery vehicles.
Off-road equipment – construction, mining, and agricultural machinery.
Power generation – diesel generators requiring reliable lubrication for continuous operation.
Marine and industrial engines – where durability and long service intervals are critical.

Heavy-duty diesel engine, illustrating LubeLine lubricants for industrial and commercial engines

Benefits of LUBELINE™ HDDEO?

By choosing premium HDDEO (Heavy-Duty Diesel Engine Oil), you can expect superior engine cleanliness that controls soot and deposits, extended oil drain intervals to reduce downtime, and improved fuel efficiency through optimised viscosity and lower friction. Our oils deliver reliable performance in extreme environments, ensuring longer engine life and protection for critical components under high load and temperature.

With deep product knowledge and strong partnerships with leading lubricant brands, LUBELINE™ provides a comprehensive range of synthetic, semi-synthetic, and mineral diesel engine oils, expert guidance on the correct API service category and viscosity grade, and fast, reliable supply across South Africa. Our technical team supports fleets, industries, and power generation clients with tailored solutions that keep equipment performing at its best.

Trust LUBELINE™ to keep your heavy-duty engines running stronger, longer, and more efficiently. Contact us today for a full catalogue of all our HDDEO products.