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Why SN PLUS?

January 20 2020
Why SN PLUS?

SN PLUS is the new API gasoline engine oil specification that protects against Low-Speed Pre-Ignition (LSPI) in Turbocharged Gasoline Direct Injection (TGDI) engines.

Low-Speed Pre-Ignition (LSPI) is an abnormal combustion phenomenon observed at low engine speeds in Turbocharged Gasoline Direct Injection (TGDI) engines in which the fuel/air mixture in the combustion chambers ignites before spark timing. LSPI can cause engine knock, broken spark plugs and cracked pistons, and, in severe cases, catastrophic engine failure.