2002 Toyota Highlander Limited AWD 4dr SUV (3.0L 6cyl 4A)
We bought our Highlander four years ago and have loved it til now. It seems there are a batch of Toyota 6cyl engines with bad valve seals. Toyota was repairing these engines until 2010. They absolve themselves after a vehicle is 8 years old. We bought our Highlander in 2010 with only 87000mi. It now has 133000mi. Now in the last six months the engine consumes large quantities of oil. The symptom of these engines with bad seals is they consume oil when driven at highway speeds. A service mgr at the local Toyota dealer
confirmed this valve seal problem when I described the pattern of oil consumption, a $2700. repair at the dealer if it is still repairable! the six seals cost $6 each!