Mobil 1 5W-50 Synthetic Oil, 1 Quart Bottles (1 case of 6) Mobil 1 5W-50s wide viscosity grade helps provide a flexible combination of powerful protection agents that provide outstanding performance in many driving situations. Prevents deposits and sludge build-up to enable long and clean engine life High performance basestocks, combined with a precisely balanced component system, for excellent all-round wear protection Wide viscosity grade to help provide a flexible combination of high and low temperature protection Anti-oxidants to help improve oil life