The contact owns a 2014 GMC Terrain. The contact stated that the was consuming an excessive amount of engine oil; however, there were no oil leaks evident. There were no warning lights illuminated. The vehicle was taken to a certified mechanic who informed the contact that the frame near the rear wheel on the driver’s side was completely rusted. The mechanic stated that the vehicle was not safe to drive. The vehicle was not diagnosed for the oil consumption failure. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 71,000.