My daily car is a late 1999 Cadillac STS which I bought in 2004 for just 18% of what it cost the original owner and with just 15,000 on the clock. BARGAIN! And while I've ramped up the mileage big time not a single thing has gone wrong with it. I get 36mpg average on a long run (that's 30mph US) which isn't bad for…