API SN PLUS is a new motor oil specification developed for turbocharged gasoline engines that is being developed in response to automakers request for motor oils that protect against Low-Speed Pre-Ignition (LSPI). LSPI is an engine condition known to occur in Turbocharged Gasoline Direct Injection (TGDI) engines that can be mitigated by changing the motor oil formulation.
The SN PLUS specification is backward compatible with older API specifications.
Extensive field tests show Schaeffer’s SN PLUS gasoline engine oils offer:
7% oxidation improvement.
20% iron wear reduction (average).
50% less chain wear as shown in the Sequence X test, which runs for 216 hours.