Hi and welcome.

Just to add what Colin stated above, higher tax bracket applies to cars registered after March '06 regardless of build year.

Oil service every 5k, including filter, bigger service every 15K.
Engine parts are not a problem due the the fact it's a Mustang one.

Cars with sunroofs can have water leaks at the drains, other niggles pretty much the same as other ZTs in the range

HTH