Mobil 1 0W-20 advanced fuel economy is an advanced full synthetic motor oil designed to help deliver outstanding engine protection and enhanced fuel economy. Mobil 1 0W-20 meets or exceeds the requirements of various vehicle manufacturers and industry standards and outperforms conventional oils. Mobil 1 0W-20 is recommended for SAE 0W-20 and 5W-20 applications. The low-viscosity, advanced full synthetic formulation can help to increase engine efficiency and improve fuel economy. Over the life of your vehicle, Mobil 1 advanced fuel economy synthetic oils can help save you money.