Lubricating oil for a diesel powered engine and method of operating a diesel powered engine

摘要

A lubricating oil composition useful for a diesel-powered engine is provided that reduces NOx emission levels produced from a diesel-powered engine. The lubricating oil comprises a base oil and at least one oil-dispersible source of HNCO such as isocyanates. A method of operating the diesel powered engine using the lubricating oil is also provided.