Roof Box Fuel Efficiency

Their study was published recently in the.

Roof box fuel efficiency.

As the british magazine what car. Adding any rooftop carrier cargo box or ski rack to your car significantly cuts your highway mileage all the time it. Adding a roof box means your car has to carve a bigger hole in the air which requires burning more fuel so your mpg will suffer. 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.

5 9 l 100 km 40 mpg roof mounted thule xtender 739 ski carrier with skis. Recently found adding properly fitted roof boxes and a modest amount of cargo to a couple of compact family models decreased their effective gas mileage by up to. They found that in 2015 roof racks nationwide were responsible for 0 8 percent of light duty vehicle fuel consumption or 100 million gallons of gasoline. 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.

Yes more than you think. 6 0 l 100 km 39 mpg thus the cargo box on the roof increased fuel consumption by about 5 compared to the baseline.