Nomad Artax Verde SAE 15W40 API CK-4 is an advanced fully synthetic heavy-duty diesel engine oil that helps extend engine life while providing long drain capability and potential fuel economy for modern diesel engines operating in severe applications. This product is formulated to deliver exceptional performance in modern and older hard-working engines. Nomad Artax Verde SAE 15W40 is formulated to reduce pollutant emissions, such as HC, NOx, CO and particles and to protect and ensure longevity of post treatment anti-pollution systems, such as particulate filters (GPF, DPF) and three-way catalysts. Nomad Artax Verde SAE 15W40 API CK-4 oils replace CJ-4 oils with the same viscosity grades and oil types ( mineral / semi – synthetic / full-synthetic) and are backwards compatible down to CF-4 oils This product meets or exceeds the requirements of the latest API and ACEA industry specifications for diesel engine oils, as well as the requirements of many major American, and European engine manufacturers.