What is the average mpg for all cars in USA?

The average MPG for all cars in the USA is approximately 25.4 MPG (miles per gallon), as of data in 2021. This average MPG value includes all types of cars on the road, ranging from smaller, more fuel-efficient vehicles to larger SUVs and trucks. The MPG of a car depends on various factors such as engine size, vehicle weight, and driving conditions.