What is Low Speed Pre-Ignition (LSPI)

What is Low Speed Pre-Ignition (LSPI)

API SN Plus is a new motor oil specification developed for turbocharged engines that was developed in response to automobile manufacturer requests for a motor oil that protects against low-speed and pre-ignition (LSPI). LSPI is an engine issue present in turbocharged gasoline direct injection engines, and can be alleviated by changing the motor oil formulation.