Join Date: Jan 2019
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I have a 2018 with the 2.5L Turbo.
After purchase, I used regular 87 for two weeks. I decided to give 93 a try, and haven't gone back. The engine seems to idle and cold start noticeably smoother on premium. Yes, it's not necessarily 'huge', but it was noticeable enough for me to be confident that it wasn't just in my head.
Though, I'd also note that I remember off-the-line performance actually felt slightly better with 87.
Now that I'm on this forum, I might give 87 a try again and report back.