My Mustang was pretty bad. I only got 16 MPG on the highway and <12 MPG in town. But I drove it less than 150 miles a month.
Now that I live on campus I bike everywhere, so I sold it. I can still borrow my mom's SUV if needed.
For those rare long trips I can rent a car at weekend rates. It's about the same price to go 100 miles and uses far less fuel.