Delo 600 ADF 10W-30 is an ultra low ash heavy duty engine oil recommended for Tier IV Final & 2017 greenhouse gas-compliant, naturally aspirated and turbocharged four-stroke engines, that API CK-4 oils and 10W-30 viscosity grade and mobile NG engines are recommended. This product meets the Detroit Fluid Specification DFS 93K222. Chevron Delo 600 ADF heavy-duty engine oils are approved for use in Cummins mobile natural gas engines. The only ultra-low ash heavy duty engine oil approved for use in mixed diesel and CNG engine fleets. OMNIMAX delivers maximum system protection to both the engine and the emissions system. This all encompassing protection helps drastically reduce the rate of DPF clogging to deliver extended DPF(1) service life and industry-redefining fuel economy retention.