Quaker State heavy duty SAE 30 motor oils are formulated to deliver consistent wear and viscosity protection throughout the life of the oil. Independent laboratory tests show that heavy duty motor oils beat industry wear standard with three times better wear protection. The used oil (standard oil drain, for the vehicle), also passed the industry standard. Today's vehicles and their busy drivers need today's heavy duty motor oil. API SN certified.

• For best performance, follow the manufacturer's recommendations in your vehicle owner's manual.
• Wear is one of the toughest enemies your engine faces; it can reduce engine life and rob your engine power; Quaker State heavy duty motor oils are engineered to reduce wear and protect against high temperature and severe service operation
• Quaker State heavy duty motor oils meet or exceed API SN and prior API SM, SL, SJ service categories
• Heavy duty motor oil contains acid neutralizing additives to stop combustion acids from corroding your engine
• Heavy duty motor oil still pass the industry wear requirements; provides stay in grade viscosity throughout the oil drain period