[CT20]

Getting an oil change at the dealership and the service manager recommended using 0W-20 instead of 0W-40. Not tracking the car at all. Does this sound ok?
2022 1SS 1LE

[Eldi Z]

No Way !!
minimum is a 30 weight, 40 is preferred.

40 Weight, either 0W40 or 5W40
30 Weight 5W30

[Msquared]

Take your car somewhere else and report that service manager! He's recommending something that will void your warranty. Look in your Owner's Manual: it tells you to use 0w-40 Dexos 2 oil. That service manager is an irresponsible moron, and if the dealership doesn't have the proper oil in stock, then they aren't equipped to service the vehicles they are selling.

[Dave88LX]

Ask him why?

[arpad_m]

Originally Posted by Eldi Z

No Way !!
minimum is a 30 weight, 40 is preferred.

40 Weight, either 0W40 or 5W40
30 Weight 5W30

The W after the first number means winter, not weight (the entire designation is the weight), but yes, 0W-20 is likely going to provide poor lubrication at high temps and is ill-advised. My assumption is that's all they had in stock and probably of the cheap kind, so steer clear of that oil (and service department).

[Eldi Z]

Originally Posted by arpad_m

The W after the first number means winter, not weight (the entire designation is the weight), but yes, 0W-20 is likely going to provide poor lubrication at high temps and is ill-advised. My assumption is that's all they had in stock and probably of the cheap kind, so steer clear of that oil (and service department).

Nowhere did I mean, or say that the letter "W" stands for weight
All I was doing is pointing out which Weights (Viscosity options) should be used.

Quick explanation to what I was referring to:
https://www.valvoline.com/en-eur/und...g-oil-weights/

Bottom line, 0W20 is not suitable for the LT1 engine in our cars