2.0 oil leak

It sounds like you are n the right track. The leak is probably cam seal or valve cover related. If either causes oil to leak on to the timing belt it will cause timing belt contamination that may result in failure.Valve cover gasket is not a big deal to replace cam seal is. Kia as a car manufacturer put a lot of great technical information and work shop manuals on line for free for Kia owners. www.kiatechinfo.com