[kavalg]

Electronic fuel injection definitely made cars more frugal back in the 90s. Also improved aerodynamics helped a bit. On the other hand, due to crash test requirements cars are now significantly heavier (I guess around 20%), people are also driving faster and enjoy more power and dynamics from the vehicle, which not only wastes fuel, but also leads to the use of wider tires, which are more expensive to produce and impact fuel economy negatively.