4b8cf347_ations___oilspecifications_org__Service_Gasoline_Engines
["S"] SN [Status] Introduced in October 2010 [Service Gasoline Engines] 
Introduced in October 2010 for 2011 and older vehicles, designed to provide improved high temperature deposit protection for pistons, more stringent sludge control, and seal compatibility. API SN with Resource Conservingmatches ILSAC GF-5 by combining API SN performance with improved fuel economy, turbocharger protection, emission control systemcompatibility, and protection of engines operating on ethanol-containing fuels up to E85. Further details about API SN...
API Engine Oil Lubricant Specifications - oilspecifications.org
Service Gasoline Engines