I asked my dealer's tech and sales rep who has a mod'd Koup himself. The Sale Rep, Noal said there is no period. FYI(Noal test drives for Apple wood Kia has a few Youtube videos) And the TECH said, that is important to drive the way you want to drive as the car will imprint from the way its driven during the first few months setting a familiar pressure into all gaskets and seals. For this reason he said driving gingerly during the 1st 2500 km's(1550 miles) then driving it hard thinking it going to be fine as it now "BROKEN IN" is going to increase the chance for blowing something. Now neither said that they are factory broken in.
OK for me taking into account that the engine and parts are new and what the tech said. It makes sense that the best way to drive any new car is to push the revs to red line from time to time but avoid long periods above 4500 RPM. Getting the parts exposed to the higher pressures but no mountain road races until the 2500 K and keep the 1/4 mile test runs to 1 a day LOL. I am 3 days into my happy ownership and that is what I am doing. Chili-red SX, 6MT, w/leather
I am out here!
Vrmmm Vrrrrmmmmmmm Vrrrrrrrmmmmmmm Errrrrrrrrrrrrrrrr