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Yes, we purchased our last 2 vehicles, 1999 Trooper, and 1999 Toyota Sienna, with the thinking that we were buying high quality maintenace free, and long lasting vehicles. I'm pretty sure we were right with the Trooper, but from the numerous items I found on the Internet when I did a search on "Toyota Oil Sludge" and "Sienna Oil Sludge" has made me think that the *perception* I had of Toyota was completely wrong. I don't have a sludge problem in our Sienna and hope it does not occur but a friend of mine says his Sienna has been diagnosed as being "sludged". My perception of Toyota was that you pay a little more for a vehicle, even though it lacked many creature conforts of similar vehicles, and you get Toyota's vaulted reliability where you can drive your Toyota well past 150,000 miles relatively trouble free.
This "Oil Sludge" problem, if indeed Toyota has a design problem, could turn out to be massive consumer migration away from Toyota because of perceived reliability problems.
Our Sienna has 49,000 miles on it and has always used regular 10w30 -- think Synthetic Oil makes sense now?
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