The contact owns a 2016 Kia Optima. The contact stated that the vehicle was experiencing an excessive oil consumption. The vehicle was taken to the dealer, where the contact was advised to complete an oil consumption test. The contact declined. The contact stated that upon driving approximately 500 miles after the oil change was performed on the vehicle, there was no oil left in the engine. The check engine warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed that oil was leaking onto the spark plug. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 70,000.