What Your Diesel Customers are Asking About FA-4 Engine Oil
The ROI benefits may outweigh the maintenance challenges With a year of the new American Petroleum Institute (API) CK-4 and FA-4 oil categories under the industry’s belt, many of your diesel customers, especially fleets, have likely switched over to the CK-4 formulation, as that was the engine OEM-approved backward compatible formula. The transition to FA-4
