API diesel oil classifications are essential for selecting the right oil for diesel engines, as they provide insights into performance standards and engine compatibility. The American Petroleum Institute (API) categorizes diesel oils with “C” ratings (for example, CJ-4, CK-4, and FA-4), where each designation meets specific requirements for protection, efficiency, and emissions. Older... https://millenniumgroup.ae/demystifying-api-diesel-oil-classifications-what-you-need-to-know/