... and GB 11121-2006; it completely meets the performance requirements of API CF-4 and SF;Viscosity Grade: Make sure the proper ... for high-performance pressurized, heavy-duty diesel engines where an API CF-4 level performance is recommended (and lower tire oils ... i.e. CF,CE and CD). Such as diesel engines of DongFeng, JieFang, STEYR, Golden Dragon, Cummins, YuChai and ChaoChai etc ...