New diesel engine oils hit the market

The American Petroleum Institute’s (API) new diesel engine oil standards – API CK-4 and FA-4 – will hit store shelves and bulk tanks nationwide. Earlier last year, API’s Lubricants Group approved the new API CK-4 and FA-4 specifications – previously widely referred to as PC-11 –  to address the needs of modern engine technologies and to help diesel engine OEMs meet increasingly stringent emissions requirements.

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