A reliable multi-grade diesel engine oil (20W-50) meeting API CF-4, offering strong wear protection and deposit control for older or high-mileage engines.
A versatile multi-grade diesel engine oil meeting API CI-4 standards, offering robust wear protection, soot control, and extended engine life for on- and off-road applications.
A synthetic technology diesel engine oil meeting API CK-4, designed for improved fuel efficiency, emission system compatibility, and extended oil life.
A fully synthetic heavy-duty diesel engine oil meeting API CK-4, balancing fuel economy, engine protection, and long drain intervals for modern low-emission engines.
RUBIA WORKS 4000 15W-40 is recommended for engines equipped with Exhaust gas after-treatment system meeting EURO Stage IV (or US EPA Tier 4F) Standard and, for On-Road, EURO 6, as well as previous standards
