I haven't had all the best of luck with contacting KIA Canada and getting through to someone in the support department. In an act of desperation, I did a bad thing. They did give you the option of hitting 2 and dialling by extension, and as most systems are 4 digits long, I eventually found one that worked and go to someone, who I was polite and informed that I had been having real problems getting someone in the customer relations to give me a call back, and that I would be calling him from now on unless he would be so kind as to get someone in the actual customer relations to call me. Well, it worked, and someone did call me back.
The gentleman from Customer Relations confirmed that really there is little to force the Extreme designation, at least in my area if you can at least show you met the regular service level that KIA will not deny you your warranty.
The conversion went around what was it that would make a car need the Extreme service schedule. When it was brought up about Vancouver having far milder weather, I pointed out that it is also on the ocean where there is saltwater, and thus they get a much higher level of salt spray and particulate in the air. I am sure that is the same with California along the oceanfront. I know it is true in Florida that corrosion is a factor for metal objects, so why would it be any different than what cars see in winter time in places that use salt?
2018 Niro EX - Ocean Blue
GTA - Canada.