Development of new diesel engine oil category underway

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Updated Jan 14, 2022


Next generation diesel engines – ones required to meet 2027 Greenhouse Gas emissions regulations – will likely usher in a new breed of engine oils. 

In 2016, oil manufacturers introduced CK-4 and FA-4 formulations that were designed to aid engine manufacturers in meeting emissions regulations for the 2017 model year. With those regulations once again tightening for the 2027 model year, the Engine Manufacturers Association last March requested the Diesel Engine Oil Advisory Panel (DEOAP) to establish a New Category Evaluation Team (NCET), and last month NCET suggested proceeding and officially kicked off the test development phase of Proposed Category – PC-12.

The new category is being requested with improvements in increased oxidation performance; new wear test capability; addition of lower viscosities; improved aftertreatment capability; and expansion of elastomer compatibility. Engine test obsolescence (test hardware becoming unavailable) will also be considered.

The expectation is that fleets and drivers should expect improved performance of oils, which supports the enhanced durability of engines and reduced cost of ownership. Potential environmental benefits include limited SAPS (Sulfated Ash, Phosphorus, Sulphur) will support engines that satisfy tighter environmental regulations on lower emissions. Longer oil drain intervals may be possible, which support sustainability goals.

In this week's 10-44, Jason and Matt visit with American Petroleum Institute Senior Manager Jeff Harmening to discuss what PC-12 could mean for motor carriers and their maintenance programs. 

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