Mobil 1 FS X2 5W-50 is made with a proprietary blend of ultra high performance synthetic basestocks fortified with a precisely balanced component system. Mobil 1 FS X2 5W-50's wide viscosity grade helps to provide a flexible combination of powerful protection agents that provide outstanding performance in many driving situations.Mobil 1 5W-50 helps to provide heavy-duty engine performance and protection for an outstanding driving experience