Compare distribution via plots

Which of the following interpretations of the plot is not valid?

50 XP

The highest mileage cars have 4 cylinders.
The typical 4 cylinder car gets better mileage than the typical 6 cylinder car, which gets better mileage than the typical 8 cylinder car.
Most of the 4 cylinder cars get better mileage than even the most efficient 8 cylinder cars.
The variability in mileage of 8 cylinder cars is similar to the variability in mileage of 4 cylinder cars.