American Petroleum Institute. The primary oil and natural gas trade association in the United States. API operates a voluntary licensing and certification program that allows engine oil marketers to use the API Engine Oil Quality Marks if their products meet specific requirements. Service Category SN PLUS was introduced in May 2018 as a supplement to API SN and International Lubricants Standardization and Approval Committee. A collaboration between the American Automobile Manufacturers Association (AAMA), Chrysler, Ford, GM, and the Japanese Automotive Standards Organization. ILSAC GF- engine oil specifications target fuel economy, emission system protection, and enhanced engine oil robustness. GF-5 to ensure that engine oils properly protect against Uncontrolled combustion that takes place in the combustion chamber prior to spark in gasoline direct injection (GDI) engines. Also known as LSPI. (Low-Speed Pre-Ignition. Uncontrolled combustion that takes place in the combustion chamber prior to spark in gasoline direct injection (GDI) engines.), a severe engine performance issue that affects gasoline direct injected (GDI) and turbocharged GDI (T-GDI) engines.
Lubricants providing low speed pre-ignition (LSPI) mitigation performance have already begun to arrive on the market, with bottles specifically labelled for use in GDI and T-GDI engines populating shops around the globe.
The first API SN PLUS oils that were introduced have been low High Temperature High Shear. A measure of a fluid’s resistance to flow under conditions resembling highly-loaded journal bearings in fired internal combustion engines, typically 1 million s–1 at 150°C. (≤ 3.5cP) SAE 5W-30, 5W-20, 0W-30 and 0W-20 based on API Group II, Group III or Group IV base oils and coupled with ILSAC GF-5.
However, API SN PLUS is now being seen claimed in conjunction with a wide range of different performance claims including European Automobile Manufacturers Association (Association des Constructeurs Européens d'Automobiles). The primary automotive standards organization in the European Union, ACEA defines performance specifications for automotive lubricants. Oil Sequences and many OEM performance specifications.
For more information on API SN PLUS, contact your Lubrizol representative.