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OPTIMA DX9 API CK-4 (FULLY SYNTHETIC)
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Optima DX 9 (Fully Synthetic) are Advanced Heavy-Duty CK-4 & FA-4 Diesel Engine Oils that are specially designed to
meet new Proposed Category 11 (PC-11) specifications for heavy-duty-vehicle. A new category be split into two
separate and distinct subcategories: one that preserves historical heavy-duty oil criteria and one that provides
additional fuel efficiency and economy benefits for modern diesel engine technology while maintaining durability.
Optima DX 9 (Fully Synthetic) improve engine performance that are being addressed include oxidation stability, shear
stability and aeration.
Optima DX 9 (Fully Synthetic) not only meets API credentials, but also is also designed to meet the latest original equipment
manufacturers (OEMs) performance specifications in appropriate grades and base stocks - including Caterpillar, Cummins,
Detroit Diesel, Mack, Renault, Volvo, Mercedes-Benz, MAN, and Ford. Optima DX 9 (Fully Synthetic) also meets the selfcertifying
requirements of ACEA E9.