 Purchased 2014 Kia Sorento in December of 2014. First three service jobs were completed at the dealership. On 9/9, I noticed smoke coming out tail pipe upon acceleration. Husband checked oil, said it was fine but said it needed changing. I knew I was about 2K over recommended oil change. Took to Jiffy Lube to have oil changed on Monday 9/12, when pulling into Jiffy Lube, smoke is billowing out the back of the car. They checked oil said there was no oil, never had a light to come on to indicate there was an issue. They put oil in it and I went straight to dealership.After a 3 hour wait at dealership and the service manager being rude because I did not have an appointment, I was told my engine is gone it is burning oil due to sludge. I proceeded to tell them there shouldn't be any sludge I had oil changed every 5K miles or so. I did realize I was about 2K miles past my service. I was told the warranty would not cover engine because I was over the recommended mileage and to even be considered under warranty I would need to produce receipts for all service done on the car. My husband changed the oil the past three times and I did not have any receipts. I was then told warranty is null and void. I mentioned I received a letter a week earlier from Kia stating a known issue with the engines and the warranty had been extended. He said provide receipts where your husband changed the oil.I contacted the owner of the dealership, he owns 5. Supposedly, he was out of town for a week and I was told the GM would call me. I never received a phone call from anyone. Needless, to say I traded within a few days. I LOVED my Sorento and had sent Kia of Auburn several customers after I purchased my car, one of which had to have her engine replaced. I will NEVER buy another Kia/Hyundai product and will share my experience with anyone and everyone that will listen!