Same here. I've been following this post for months waiting for someone to figure out a fix to the issue. I bought my 2016 last year but didn't have the noise start until about 9k miles on the engine. Now that I'm nearing 24k and after the fuel treatment service from the dealership it has gotten louder in V4 during acceleration and noticeable in V8. I can't wait for them to figure out fix to this.