Zeronero - I have the same attitude about timing chain and guides and running the car until it dies. The difference is I have been using synthetic oil (Mobil 1) since I bought the car when it had 58K now it has 166K. I suspect a chain job is going to be expensive any idea what it would cost? I also agree with sixto any damage is already done synthetic is not going to revitalize worn parts. BTW mine is also 92 400E.