Why you might want to focus on FA-4 engine oil
With a year of the new American Petroleum Institute (API) CK-4 and FA-4 oil categories under the industry’s belt, you have, most likely, switched your fleet over to the CK-4 formulation, as that was the engine OEM-approved backward compatible formula. The transition to FA-4 formulations for 2017 engines, on the other hand, has been a
