NHTSA Complaint #11589106 — 2016 HYUNDAI TUCSON

Engine is being replaced due to excessive oil consumption. First sign was engine knocking in November 2022, which resolved with oil change. July 2023, engine knocking was heard again, Hyundai dealer said car came in with no oil. Had oil changed / filled, was advised to bring car back in 1000 miles. December 2023, brought car back to dealer after ~1000 miles, no knocking but oil was 2 quarts below spec. Ladder frame was resealed and ladder frame o-ring replaced. Oil was refilled, oil pan and oil dip stick both sealed for oil consumption test. Feb 2024, car brought back to dealer after ~1000 miles, no knocking but oil was 1.8 quarts low. Combustion chamber cleaning was performed and oil refilled. Oil pan and oil dip stick both sealed for another oil consumption test. Early May 2024, car brought back to dealer after ~1000 miles, oil still apparently quite low (no details provided by dealer). Engine replacement approved by Hyundai corporate in mid-May 2024.