joking aside, i have the sister car (Tucson) and ours is a Diesel and i do give it a run and raise the revs every now and again due to lowish miles, a few weeks back our vehicle seemed to be hesitant i thought i should give it a run. however a few days later the car would not start. RAC came, i pointed out it seemed to hesitant and shuddery the other day and we do low miles so could it be something to do with the filter?.
he did a few checks, and it turned out it needed a new Battery (not even 3 years old). he said its common with the start stop tech vehicles and a lot are needing replacing after a couple of years.
so it may also be that rather than needing a blow out, which i highly recommend just for the fun aspect (in a safe a legal way)