Protecting low emission engines
Mobil Delvac™ heavy-duty engine oils are designed to lubricate and protect modern, low-emission engine designs.
These diesel engine designs often include low oil consumption rates, use of exhaust gas recirculation (EGR), selective catalytic reduction and sometimes diesel particulate filters.
For commercial vehicles fitted with diesel particulate filters, a range of outstanding low-ash synthetic oils is available.
Diesel emission standards: EGR engines and their challenges
In order to lower the level of NOx in the exhaust, original equipment manufacturers began incorporating EGR systems into their new engine designs.
As heavy-duty diesel emission standards for nitrogen oxides (NOx), solid matter, hydrocarbons and carbon monoxide become stricter, original equipment manufacturers have found innovative ways to meet those requirements while still meeting customer needs for power and efficiency.
Although each manufacturer’s EGR system is different, EGR always 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.