Kirkland Signature™ Full Synthetic 5W-20 Motor Oil is formulated to reduce wear on critical parts and maximizes fuel economy. Our 100% synthetic formulation provides long-lasting engine protection and performance. Helps prevent Low-Speed Pre-Ignition (LSPI) commonly seen in modern, turbo-charged direct injection gasoline engines. Controls friction and engine wear better than the latest API SN PLUS requirement, especially during cold starts. Protects against high temperature shearing to maximize oil life even in long drain intervals (Always consult owner’s manual for recommended drain interval).