0W-20 vs 0W-40 in GM 2.0 turbo

[skip1944]

Reading about GM's decision to go from a 0W20 to a 0W40 in the L87 engines brings a question.
The GM 2.0 turbo requires 0W20 as the recommended viscosity.
My 2.0 as well as other 2.0 turbo the GM puts in the buick models from China are experiencing high oil consumption.
Would going to a 0W40 reduce oil consumption without causing any VVT or any other issues.

 

[JavierH19]

It did when I switched from 20 to 40 in my l87 years ago. Thicker in general reduces consumption but not always and very rarely may it increase it but changing from one 0w-20 to another can do the same thing too. The l87 is vvt too and toyotas spec everything from 0w-20 to 20w-50 outside of the US.

Don't see why a dohc gm engine would have vvt issues of any kind since they're usually torque actuated and having more oil pressure helps with the locking pin engage as some engines can have just weak enough oil pressure to where the pin won't stay engaged and rattle at hot idle. But having too much doesn't hurt anything. The solenoid isn't fragile and there's always a relief valve in the pump and filter.

 

[kschachn]

Reading about GM's decision to go from a 0W20 to a 0W40 in the L87 engines brings a question.
The GM 2.0 turbo requires 0W20 as the recommended viscosity.
My 2.0 as well as other 2.0 turbo the GM puts in the buick models from China are experiencing high oil consumption.
Would going to a 0W40 reduce oil consumption without causing any VVT or any other issues.

Same answer as the other 100 same questions, it will not cause issues.