I'm new with mechanics and I want to learn more about cars so my question is if the perfect ratio of gas to air is one part gas 14.7 parts air and the throttle controls the amount of air the is taken into the engine then wouldn't driving faster be more fuel efficient?
And why is it that mustangs get 18-20 mpg but honda civics get 40-45 mpg even though they have the same gas to air ratio?