Awareness of the advantages of low-viscosity heavy-duty engine oils can help to narrow the gap between what fleet owners and operators want and what original equipment manufacturers are currently specifying.

In 2016, the American Petroleum Institute provided its latest guidance on heavy-duty engine oils with the introduction of the CK-4 and FA-4 performance categories. The new lubricants were designed to meet the changing hardware needs of original equipment manufacturers and to deliver fuel economy gains that could help to lower the overall cost to operate fleets throughout North America. The category offered backward compatibility through CK-4, which led to a smooth transition to the new performance category. 

Click here to read the article in Lubes 'n' Greases.