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Mobil Delvac™ synthetic engine oils are designed to lubricate and protect modern low-emission engine designs. These designs often include low oil consumption rates, use of Exhaust Gas Recirculation, Selective Catalytic Reduction and sometimes Diesel particulate filters.

For Commercial Vehicles fitted with Diesel particulate filters, we have developed a range of outstanding low-ash synthetic oils.

Exhaust Gas Recirculation (EGR) Engines and their Challenges
As heavy-duty diesel emissions standards for nitrogen oxides (NOx), solid matter, hydrocarbons, and carbon monoxide become stricter, Original Equipment Manufacturers (OEMs) have found innovative ways to meet those requirements while still meeting customer needs for power and efficiency. 

In order to lower the level of NOx in the exhaust, OEMs began incorporating Exhaust Gas Recirculation (EGR) systems into their new engine’s designs. Although each manufacturer’s EGR system is different, in outline, EGR works by recirculating exhaust gas, metered and controlled by the electronic management system, back into the intake system.  This increases the challenge for the engine oil due to the need for greater soot, heat, deposit and corrosion control.