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I own a 2017 XE R-sport 3.5L with 40k miles on her. I bought the vehicle a couple months ago and it’s a dream. Recently, however, the engine has been much louder while cruising. The dealer looked at it and said nothing is wrong and that because it is colder (and in turn may be asking the car for greater functionally in the cabin) the car is producing more power to augment. I find this is probably true in theory but not applicable to my circumstances as I noticed the issue in Florida during a relatively mild day (75 F / 24 C). Moreover, I live in Washington, DC and it is not very cold here right now.

Does anybody have any insight? The car is out of warranty mid-2021 and if there is an issue I’d like to root it out before then. Thanks!

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