The American Petroleum Institute's new diesel engine oil-service categories, API CK-4 and FA-4, will begin appearing in the marketplace on December 1. New API Donuts denoting the categories will ...

The American Petroleum Institute (API) has licensed approximately 400 CK-4 and more than 60 FA-4 oils submitted by large, medium and small oil marketers. While already significant, API expects ...

The diesel engine oil available for your fleet is about to undergo a major change. Two new oil categories, CK-4 and FA-4, have been announced by the American Petroleum Institute (API) and will replace ...

We may receive a commission on purchases made from links. Engine oil serves a number of purposes in one's vehicle. It forms a layer of protection on the metal parts of the engine as it warms up while ...

With a commitment to advancing the country's energy sector, Pakistan State Oil (PSO), the nation's largest energy company, has developed the first fully synthetic CK-4 graded heavy-duty diesel engine ...

The American Petroleum Institute (API) released the FA-4 engine oil specification nearly four years ago. While lubricant manufacturers stand behind the benefits of FA-4, slower OEM adoption and ...

Amsoil has added a 10W-30 diesel oil to its commercial-grade family of products. The new Amsoil 10W-30 Commercial-Grade Diesel Oil is designed for those seeking an upgrade over conventional and other ...