NHTSA Complaint #11617791 — 2020 KIA TELLURIDE

We purchased a new 2020 Kia telluride in late 2019. We purchased this vehicle because of its 100,000 mile warranty. We went the extra step and added the best extended warranty possible so we were covered for many miles and years. I have always done my own oil changes as I am a journeyman fitter and understand the mechanics of a vehicle. I kept every receipt from every oil and oil filter purchase for the last 5 years as well as a detailed log book. Around 75,000 miles we started noticing major oil consumption. Approximately 1 quart every months and then up to about a quart every 2 weeks. We also notice a huge loss in engine power and take off. My wife said she was having trouble pulling out onto hills and was very dangerous at intersections, because of the lack of power. We then took the Kia telluride to my main mechanic, he replaced all 6 spark plugs and said we should immediately take it to a dealer as it sounds like the timing chain maybe going bad. This was early August 2024. I made an appointment with Diehl Kia in hermitage the next day for [XXX]. After a few days the dealer called and said that they could not get the car to replicate the noise they heard when they brought it in. It sat for 2 weeks before they decided to open a claim with Kia customer service. Kia recommended they do an internal investigation at the customer cost which we approved. They said they had found some build up and Kia was requesting the oil change records which I promptly provided. Kia then recommended to do a compression test on the cylinders. Again at customer cost. Even though the vehicle has less than 100,000 miles and the warranty is still valid. We agreed to pay for the compression test as well. After a few more days the service associate called me and said that the compression test had passed to my surprise. A few more days went by and we really had no answers. After pressing the dealer for answer they finally told me that Kia was not accepting our service records.