API diesel oil classifications help drivers and fleet operators understand the performance level, protection quality, and suitability of engine oils for different diesel engines. These classifications—such as CK-4, CJ-4, CI-4, and CH-4—indicate how well an oil handles soot control, oxidation resistance, wear protection, emissions system compatibility, and high-temperature stability. M... https://millenniumgroup.ae/demystifying-api-diesel-oil-classifications-what-you-need-to-know/