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According to the Filler Cap on the engine, it says to use 5W-30.

However, my Chevy dealership used 10W-30 on the last oil change. Not sure if they've always been doing this or just this last time. I've never paid attention before and haven't yet asked them why.

I'll be doing my own oil change later today and using 5W-30. It'll be interesting to see if the car performs any differently.

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14y ago

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