Sources: Shell Oil Co., Houston; American Petroleum Institute, Washington, D.C.; CP staff
Shell Lubricants has timed an ambitious Rotella heavy-duty engine oil portfolio update with two new American Petroleum Institute diesel engine oil standards. Premiering in December, API Service Categories CK-4 and FA-4 succeed Service Category CJ-4 oils widely recommended among on- and off-highway diesel engine manufacturers over the past decade.
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