What to Expect from 2027 Diesel Engine Oils
New EPA 2027 emissions rules also mean new diesel engine oil specs. A new generation of heavy-duty engine oils will feature lower viscosity, improved thermal resistance, and possibly longer oil drain intervals.
In conjunction with an event showing off its Starship technology demonstrator truck, Shell recently offered an update on the current state of the heavy-duty diesel engine oil category being developed by the American Petroleum Institute to meet the needs of the new generation of engines.
The current oil category is actually two — CK-4 and FA-4 categories, depending on viscosity requirements. Launched in 2016, those categories were the first time the heavy-duty diesel engine category had been split in two.
However, new diesel engine emissions regulations from the Environmental Protection Agency further limiting NOx (Nitrogen Oxides) emissions come into effect on January 1, 2027. Those regulations require hardware changes on equipment. And those, in turn, require some additional performance characteristics from the oil that lubricates those engines.
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