The empty roof rack had a nearly 2 percent impact on fuel economy which translates to a little more than three quarters of a gallon of gas.
Thule roof rack gas mileage.
Constantly aiming at staying one step ahead and working closely together with the car industry thule introduces a new generation of roof rack systems.
I now drive around with just the cross bars on and add adapters as needed for bikes or boats.
The roof rack mpg experiment 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.
This editor many years ago in a move across the country to oregon from michigan found that the highway mileage of a four cylinder accord dropped from more than 40 mpg down to 32 mpg with a.
With the racks on and bikes on the roof it is 24 25.
Didn t track that closely last time i did a long drive with boats on the roof but i think it was a slightly worse than with bikes.
39 mpg thus the cargo box on the roof increased fuel consumption by about 5 compared to the baseline.
42 mpg roof rack with thule dynamic 800 aerodynamic cargo box.
He found that compared to the baseline of no roof rack the empty rack reduced his mpg by 12 7 and the roof rack with a bicycle reduced it by a whooping 27 3.
The control test the tourx without roof rails.
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.
40 mpg roof mounted thule xtender 739 ski carrier with skis.
Thule edge and thule evo.
Car was getting 26 27 mpg.
The next generation of roof racks.
5 9 l 100 km approx.
5 6 l 100 km approx.
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.