The API SN PLUS specification was requested by the automobile industry to protect passenger vehicles from low-speed pre-ignition (LSPI). LSPI is the spontaneous ignition of the fuel/air mixture prior to spark-triggered ignition. It occurs in today’s advanced engines and is much more destructive than typical pre-ignition.
|One of the possible designs for the new API “donut.” Our labels will soon be updated to include the SN PLUS specification.|
AMSOIL is ahead of the game and our current formulations of Signature Series, XL and OE synthetic motor oil all meet or exceed the new SN PLUS specification. Our product labels will soon feature the new API “donut.” Signature Series, XL and OE also achieved 100 percent protection against LSPI1 in the engine test required by the GM* dexos1 Gen 2 specification – zero occurrences were recorded in five consecutive tests.
You can be confident that AMSOIL synthetic motor oils protect modern engines against LSPI, helping your vehicle deliver years of reliable service.
For more information on the dangers of LSPI, visit www.amsoil.com/lspi.
1Based on independent testing of AMSOIL Signature Series, XL and OE 5W-30 Motor Oil in the LSPI engine test as required for the GM dexos1 Gen 2 specification.
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