(Also posted in Mechanical/Maintenance)
https://www.fcsdchemicalsandlubricants.c...ory=Motor%20Oil
"... This oil also meets WSS-M2C946-B1, dexos®1 GEN 2 and SN PLUS, therefore it can reduce oil derived low speed pre-ignition
Approved to service General Motors vehicles where this viscosity is recommended. (dexos 1 GEN 2 oils also meet WSS-M2C946-B1. Oils labeled WSS-M2C946-A do not meet dexos 1 GEN 2)
..."
https://www.fcsdchemicalsandlubricants.c...ory=Motor%20Oil
"... This oil also meets WSS-M2C946-B1, dexos®1 GEN 2 and SN PLUS, therefore it can reduce oil derived low speed pre-ignition
Approved to service General Motors vehicles where this viscosity is recommended. (dexos 1 GEN 2 oils also meet WSS-M2C946-B1. Oils labeled WSS-M2C946-A do not meet dexos 1 GEN 2)
..."