Oh come on. Grande doing 19 at 100??
Tell me the location of mechanic who could modify and tune your car to achieve this much average.
Over exaggeration. People completely sh*t in mathematics making weird claims here.
By the way even my GLI meter never showed me more than 13.8 average/liter no matter how slow or fast I drive. And here I am hearing noises of 18 - 19. Just wow.