I applauded Kia/Hyundai as when they did an oil consumption test and found oil usage exceptionally high, they took it upon themselves to do a replacement, but in the last year, I'd say their philosophy changed, and now, rather than replacing the oil burner they've decided to give the consumer a hard time and have them just keep adding oil. Hopefully the engine will seize, but from experience, the engine just keeps on running and as above, why change the oil when a qt is needed every 500 miles.
No type of maintenance or any additive will save the crappy engine, if it's going to go, it will go, hopefully slowly. I would be leery of adding any additive as it may be evident at time of inspection, and it would be just another reason for them to deny the lifetime warranty. The daughter's 2.4 seized 9 miles after the cel came on, in a downpour when on a narrow country road, talk about a safety issue. When I arrived, there were 3 police cars trying to reroute the traffic around the SUV, then we pushed it down the hill onto a side road, then the tow-truck showed up, with a genius driver. Before loading onto the flatbed, he did some tests and came up with remarkable deduction that the starter was bad, I didn't say a word, just looked at the daughter and let him go about his business. The SUV was dropped off at the dealership and returned 11 days later after the new engine was installed.