Day: May 31, 2019

Spotlight on API SN PLUS Motor Oils

After just over a year since API began licensing motor oil against the SN PLUS Service Category, PQIA is observing its dominant presence in the market. Below are four more API SN PLUS motor oil brands recently examined by the PQIA and the tests conducted on the samples meet the SAE J300 specifications for the… Read More ›

SN PLUS Motor Oils – Calcium Down, Magnesium Up

The SN PLUS Service Category was introduced as a supplement to API SN specification in 2018 to mitigate low speed pre-ignition (LSPI) events in Turbocharged Gasoline Direct Injection (TGDI) engines. Such LSPI events can cause engine knocking, decreased efficiency, and in the worst case, catastrophic failure due to cracked pistons.