Hate to pile on this buyer beware topic here but I have had my 2020 ST for 8 months now. It was a certified pre-owned from a Ford dealership and when I bought it I bought literally every extended warranty they offered for it. From Ford, not the crazy random spam calls version lol.
In 8 months it has been in the shop 3 times chasing a burning oil smell. Every time has been a royal pain in the A with the dealership. Always taking close to a week repair, issues with getting a loaner car from them, and a whole list of constant problems every time. First time it was a Turbo, wound up with 2 new ones. Next time was an axle boot leaking, 3rd time was another boot leak again. For the record, the smell does keep coming back when I'm driving it hard and it's not residue still burning off. Now, at 31K I'm getting the dreaded transmission shudder when putting it in D or R. The issue isn't new though as it has been hesitating and poorly getting a gear at low speeds then hanging forever in certain gears at higher ones. It's just getting worse with this shuddering. I joined the forum today to start trying to figure this out.
I do love this ST overall as it is a lot of fun but I have never in my lifetime of owning over 35 vehicles had this much trouble and dealership visits. Especially not in the first 8 months of ownership. I did literally everything you can do in terms of pre-purchase research and subsequent warranty purchases but this cycle is getting very old and is legitimately starting to take away from owning this thing to the point that I am starting to casually look at options to get out of this truck or at least get another one on Ford's dime. Good luck with that I know but this is getting frustrating.