A (hybrid gas) may top a list of (fuel misers) with some mpg.
(Passenger cars) may have a (fuel efficiency rating) of some mpg.
A (fuel consumption rating) can be constituted-of-or-filled-with some mpgs.
A (fuel consumption) can be constituted-of-or-filled-with some mpgs.
(Fuel efficiencies) can be constituted-of-or-filled-with some mpgs.