Quaker State 10W-40 motor oil helps engines survive daily commutes from high-speed highway operation to repetitive, stop-and-go driving. It reduces engine wear to provide durable wear protection and combats engine sludge and deposits. Quaker State motor oil also provides corrosion protection from harmful acids generated by engine contaminants. Recommended for all vehicles that require use of SAE 10W-40 motor oil, it maintains the required viscosity from start to finish.