The next-gen heavy-duty engine oil standard (PC-12) has been formally approved, announced the American Petroleum Institute, which also introduced the new CL-4 and FB-4 “donut” certification marks ...
The American Petroleum Institute (API) has updated the standard governing its Engine Oil Licensing and Certification System (EOLCS), which outlines how engine oil marketers certify gasoline and diesel ...
The American Petroleum Institute's new diesel engine oil-service categories, API CK-4 and FA-4, will begin appearing in the marketplace on Dec. 1. API has developed two visually different API Service ...
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