NHTSA Complaint #11429503 — 2016 KIA SORENTO

In the past year my vehicle has exhibited a high consumption of oil. At present it has 92000 miles. At last check it consumed 1.7 quarts of oil in 750 miles. I have done as request by Kia. They request I do an oil change at the dealer followed up by checks at 1000 miles ( 2 quarts low). At the check at 2000 miles it was again 2 quarts low. They performed what they called a combustion chamber cleaning that was again followed by a check at 1000 miles (1.1 quarts low). After the next check it was at the 1.7 quarts used in 750 miles. Although Kia advertises a 10 year 100000 mile warranty they are excluding me from repair because I am the second owner. I did purchase an extended warranty for 4 years and up to 100000 total miles but I didn’t find the problem until March / April of this year. Kia admits this was caused by soft, improperly heated rings but will not offer any assistance to alleviate the problem. Do I have any recourse with Kia on this and can you help?