Fuel Efficiency With Roof Rack

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.

Fuel efficiency with roof rack.

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. Their study was published recently in the journal energy policy in a paper titled fuel consumption impacts of auto roof racks. 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. That second run returned a fuel consumption of 7 06l 100km that s 0 6 litres more than our control run.

That s not so good over a short 100 kilometre run let alone a year. An empty rack has been reported to increase the cost of fuel over time from anywhere from 1 to 15 while a fully loaded roof rack will add 20 to 50 to your fuel bill. 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. I ll justify these numbers below.

According to a new study by yuche chen and alan meier published in the most recent issue of energy policy roof racks are responsible for 0 8 of light duty vehicle fuel consumption in 2015 corresponding to 100 million gallons of gasoline per year. 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. Generally adding a loaded roof rack to your car will lower your gas mileage by at least 10 percent. Next we equipped a set of roof racks and a bike carrier attachment to the roof of the forester brimmed the tank once more and set off completing the exact same run a second time.

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. Their study was published recently in the. Some drivers may see their gas mileage drop by as much as 20 percent depending on vehicle type and type of roof rack. Mileage went from 41 mpg at 65 mph to 40 mpg.

The control test the tourx without roof rails.