What would cause a 2001 Chevy Metro to burn oil?

if the 2001 Chevy metro is a 1.3L motor, chances are the valve guides are wearing causing oil to be burned. this is easily provable by letting the car sit overnight. when you start it in the morning if a puff of oil smoke comes out of the tail pipe and goes away fairly quickly and doesnt show off colored smoke the rest of the day, then the valve guides in the head are wearing. if you're adding more than a quart every 1000 miles then its probably a leaking oil pan gasket or something more serious