2015 Impala 3.6L oil recommendation

[thunderous1335]

.

 

[buster]

Off the shelf 5w30's are perfectly fine.
You could also go all out and use HPL 5w30.
You could also consider stepping up to M1 0w40 potentially a bit more wear protection at that mileage.

 

[buster]

I will look into the PCV system and inspect it.

Was 2012 the year GM addressed the timing chain issue? Maybe not as a complete fix but an improvement at least?

That being said, I will continue with the OCI's of 5K miles max on full syn.

LGX/LGZ was 2017-18 I believe. Entirely new engine.

https://gmauthority.com/blog/2019/01/gm-patents-innovative-new-integrated-oil-separator-assembly/

 

[i6pwr]

LGX/LGZ was 2017-18 I believe. Entirely new engine.

https://gmauthority.com/blog/2019/01/gm-patents-innovative-new-integrated-oil-separator-assembly/

Correct, but for the larger timing chain itself, I think that was 2012 and later.