Quaker State 550038081 Ultimate Durability 0W-20 Motor Oil Lubricant, 5 quart More protection for friction related wear More engine life, as your engine temperature increases, heat-activated viscosity improvers and anti-wear additives kick-in. More performance, excellent lubrication in freezing temperatures. Improved resistance to engine stress at high engine speeds or under heavy loads Excellent protection against the formation of sludge and other harmful deposits.