API PC-12: What Fleet Owners Need to Know for 2027
API Proposed Category 12 (PC-12) API Proposed Category 12 (PC-12) heavy-duty diesel engine oil specification, is the next generation of diesel engine oil standards being introduced to support 2027-emissions-compliant heavy-duty engines. It will replace today’s API CK-4 and FA-4 oil categories with new categories called API CL-4 and API FB-4. When Does PC-12 Go Into…