Dear Tom and Ray: You recently answered a question about whether it's harmful to let your gas tank run down to empty. You said it's not harmful to the car, and it won't cause any damage. Eric Peters, ...

Clogged fuel filters, dirt in the carburetor, floats sticking, hard starting, gas gauges that don't work these are just a few of the fun things a dirty, scale-filled, rusty, 50-year-old gas tank can ...