I have a 2018 Malibu. I took it in for a scheduled 5k oil change, and now there is a slight tapping/knocking sound coming from the engine, so I took it back to the dealer, and she told me that something is restricting the oil flow, and they are going to have to "open the engine up". My concern is I have a car that was running great prior to the oil change, and since the oil was restricted, I'm sure it put stress on the other engine parts I am being told that I should demand a new car, since the integrity of a new motor has been compromised.
You might get a new motor if there is serious damage but not a new car.
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