My Toyota manual says 90K for a timing belt change. I have 20K to go. My truck sees mostly highway miles at relatively low rpm. I'm confident that it will hold together to make it to it's 15 year check up. If not, so be it. The truck doesn't owe me a dime. By the way, My wife's 1980 Toyota Tercel ran 200K miles with no engine work at all. Her 1992 Camry got a timing belt at 120K miles. That '92 Camry was the best vehicle we ever owned. Traded it in for a new 2007 Camry and got $3500.00 for it! I will say this, the new Camry is not built as well as the '92. The 92 was much quieter.