Engine Oil Leaking problems of the 2003 Toyota Highlander

The engine on this vehicle required a complete rebuild, at a cost of over $5000 due to oil leaking into the engine and fouling the components. In the months leading up to the complete engine failure, the vehicle stalled repeatedly on both city roads and highways, creating a dangerous situation several times. Whenever the oil was changed, the problem became worse and the vehicle would use up to 4 quarts of oil per week for several weeks. I contacted Toyota's corporate office by letter and phone and was told that no defect existed. Toyota is currently recalling earlier models of this vehicle for the same problem. The vehicle was emitting white smoke from the tailpipe for several months before the engine failed. Eventually, it would only sustain a speed of 30 mph. The vehicle was checked by three mechanics who all found the same problem. This vehicle is used to transport a handicapped person, and was also used to transport children frequently. In order to save the money for the repairs, which I had to make because I am still making payments on the loan for this car, I had to purchase a very old and inexpensive car to get to work. The Toyota sat parked for 9 months before it could be fixed. Had I not been able to buy this second car, I would have lost my job. I could not put my daughter's wheelchair in the other car. She is able to walk only for short distances. This created a severe hardship and also contributed to her developing a foot wound and infection of the bone in her foot. This medical issue required 3 surgeries and 5 hospitalizations, plus over 6 months of iv antibiotic therapy. I narrowly avoided several accidents when the car stalled in traffic. If I was not such an experienced driver, it is highly likely that a serious accident would have occurred.