5: 1963 Volkswagen Beetle
The original Volkswagen Beetle was an icon of the 1960s and naturally, many baby boomers still own their original Beetles. Albert Klein managed to get his Beetle over the million-mile mark and still keeps it on the road. “The car’s fenders are dented, its upholstery is torn, its paint is chipped and faded. But the one thing you can say for this humble Beetle is that it runs–and runs and runs. After 24 years, seven engines, three transmissions, 150 tires, 35,600 gallons of gas, three sets of wiper blades, and more than $38,000 in maintenance costs, the Pasadena man’s trusty “bug” turned its millionth mile on Tuesday.” – via LA Times

The simplicity of the air-cooled engine makes the Beetle a breeze to work on. Although the car is old by today’s standards, the amount of available parts is plentiful. It also helps that this original body Beetle was manufactured in Mexico up until recently. This means that you can outfit your bug with modern parts and enhancements.