
Hi everyone, I have a 2016 3.6 Grand Cherokee. Recently, after switching to 0-20 oil, I've noticed a "doo-doo" sound coming from the exhaust area inside the car. It's not very noticeable when I get out of the car, seems like some kind of resonance. Also, after the oil change, the engine sounds louder. I've driven 400 km since then and there's no improvement. Any ideas?
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4Hi everyone, I have a 2016 3.6 Grand Cherokee. Recently, after switching to 0-20 oil, I've noticed a "doo-doo" sound coming from the exhaust area inside the car. It's not very noticeable when I get out of the car, seems like some kind of resonance. Also, after the oil change, the engine sounds louder. I've driven 400 km since then and there's no improvement. Any ideas?
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