My 2000 Linclon Town Car is leaking oil and smoking-- car has 107,500 miles.

It's the years not the mileage.....It took me a while to realize this but time is way more important than mileage......I had an older Honda Accord for almost 20 years because it was a GREAT CAR, but, all the really expensive repairs and there weren't that many, the last five years were the most expensive. Unless it's a collectible car, there's NO REASON to keep old cars. And, old cars are definitely NOT as safe as newer models. Sometimes it's better to say goodbye.