With the launch of the new API CK-4 and FA-4 heavy duty engine oils, many OEMs are now allowing an extension of oil drain intervals when these products are used in their newer engines. This is big news for on-highway fleet operators. Chevron has just published a comprehensive guide to North American Truck OEM recommended drain intervals, detailing all the major manufacturers’ recommendations by engine type based on the new oil categories.
Just how significant are these oil drain interval extensions? Among all the leading manufacturers, we are looking at double-digit percentage increases in mileage between drains for newer engines: for Volvo, around 20%; for Paccar, 25%; and for Daimler, as much as 50% in long-haul applications.* Certainly, fewer oil changes every year means a big expense reduction for fleets.
Improved Oxidation Stability is Key
To be clear, it is not just the advancement in oil formulation that is making these extended intervals possible. The newer engine designs produce less soot, meaning less contamination in the oil, which can help extend oil life. However, improved oil oxidation resistance and wear performance with the new oil categories are the main factors in helping to allow for extended oil drain intervals, while still maintaining engine component durability. Providing improved oil oxidation performance was a key priority in the development of API CK-4 and FA-4 oil categories. Our new Delo 400 oils show up to a 35% improvement in oil oxidation control compared to the prior generation of heavy duty motor oils in engine qualification testing.
Engine manufacturers, truck builders and lubricant suppliers have been working together to improve total vehicle efficiency as part of the evolving Greenhouse Gas Regulations. This collaborative effort has led to improved GHG ‘17 diesel engine models and lower viscosity heavy duty engine oils that help maximize fuel economy performance, reduce CO2 emissions, and support improved engine reliability and protection. When these improvements are extended across an entire fleet they help reduce maintenance costs, keep trucks on the road longer and dramatically improve ROI.