Increasing fuel economy and emissions standards continue to drive automotive technologies, and those technologies are placing higher loads and demands on lubricants. OEMs are demanding engine oils that assist them in meeting fuel economy and emissions requirements while protecting engines through the life of the vehicle. Idle stop, low-speed pre-ignition and turbocharged engines are just a few of the protection challenges in front of modern automotive engine oils.
The pending ILSAC GF-6 engine oil specification is intended to address the issues arising from emerging technologies. However, with timing getting pushed out to 2019 or 2020, API updated its SN rating, releasing the SN Plus oil classification as a stop gap.