Leaking oil at 4500miles

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. The good news here - sounds like you have a Kia factory warranty that would be in effect for something like this. I would suggest seeing your local Kia dealership for an in-warranty repair evaluation. Note that the only way the concern would not be covered by a warranty is if there was negligence during maintenance, such as a filter or drain plug not properly secured, or if there was physical damage, such as impact to a component leaking oil. I'd suggest they inspect and advice and hopefully resolve the concern for you!