CK-4 or FA-4?

API CK-4 and API FA-4 oils represent an upgrade in lubricant technology for the trucking industry. We want you to make the most of these improvements by using the right diesel engine oil for your trucks. API CK-4 and API FA-4 oil recommendations can vary between original equipment manufacturers (OEMs), so we’ve provided a helpful chart below that contains the latest information.*

Recommended oil:

*This chart is updated regularly as additional OEM information becomes available. Please refer to the owner’s handbook for OEM application requirements and oil drain intervals for your vehicle or equipment.