API Service Category SN PLUS was introduced in May 2018 as a supplement to API SN and ILSAC GF-5 to ensure that engine oils properly protect against low speed pre-ignition (LSPI), 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 HTHS (≤ 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 ACEA Oil Sequences and many OEM performance specifications.

For more information on API SN PLUS, contact your Lubrizol representative.