ExxonMobil announced that four of its heavy-duty diesel engine oils have met the new CI-4 Plus specification of the American Petroleum Institute (API).
The company's Exxon XD-3 Elite 15W-40, Exxon XD-3 Extra 15W-40, Mobil Delvac 1300 Super 15W-40, and Mobil Delvac 15W-40 all meet the API CI-4 Plus specification.
A modification of API's CI-4 standard, originally released in October 2002, CI-4 Plus licensed lubricants are required to deliver improved soot handling and shear stability performance in all engines. These improvements enable engine oils licensed under this specification to better withstand the severity of the latest low-emission engines. The CI-4 Plus standard took effect Sept 1, 2004.