Understanding API CK-4 and FA-4
What are CK-4 and FA-4 oils all about? Which oil should I use? And how will using these oils affect my fleet? If you still have questions about CK-4 and FA-4 oils, then you’ve come to the right place. Learn everything you need to know about the latest diesel engine oils here.
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API CK-4 or FA-4?
Find out which oil is right for your trucks. See our OEM heavy-duty equipment chart for CK-4 and FA-4 product recommendations.
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Development of API CK-4 and FA-4
Get more of the story behind CK-4 and FA-4 oils. Plus, learn how your fleet can make the switch to these advanced oils.
Learn more about the API CK-4 and FA-4 story
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Fleet performance
Keep your trucks and business going strong with the latest information, PC-12 oil recommendations and efficiency tips.
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Energy efficiency guide: Saving energy on the road
Use this helpful energy efficiency guide to make sure that your fleet and business save energy and money on and off the road.
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Learn about PC-12
API PC-12 goes into effect in 2027. Find out everything there is to know about this new category.
Learn more about PC-12
