Roof Rack Gas Mileage

So it varies depending on the vehicle on the rack and on the driving highway or city but it s at least five percent and probably a lot more.

Roof rack gas mileage.

Let s say that you drive 15 000 miles per year gas is 2 50 gal and your gets 25 mpg. Drag coefficient increases by speed squared. The control test the tourx without roof rails. So if your car usually gets 30 mpg on the highway and you add a full roof rack your highway gas mileage will drop to 24 27 mpg.

He compared the gas mileage of his car at 54 7 mph 88 kph with 1 no roof racks 2 an empty roof rack and 3 a mountain bike on the roof rack. Some drivers may see their gas mileage drop by as much as 20 percent depending on vehicle type and type of roof rack. Berkeley lab says that roof racks cause as much as a 25 percent loss in fuel economy and accounted for almost 1 percent of national consumption in 2015. Mileage went from 41 mpg at 65 mph to 40 mpg.

The roof rack mpg experiment. Off the showroom floor the regal tourx gets 21 miles per gallon in the city and 29 mpg highway for a combined fuel economy of 24 mpg. Generally adding a loaded roof rack to your car will lower your gas mileage by at least 10 percent.