Gas Miliage Drop 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.

Gas miliage drop roof rack.

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. I ve put cross bars on two different odys with no measurable effect on mpg. Drag coefficient increases by speed squared. It caused a whopping 34 percent drop in fuel economy or 10 mpg.

Generally adding a loaded roof rack to your car will lower your gas mileage by at least 10 percent. Their study was published recently in the journal energy policy in a paper titled fuel consumption impacts of auto roof racks. Let s say that you drive 15 000 miles per year gas is 2 50 gal and your gets 25 mpg. 6 0 l 100 km approx.

If most of your driving is freeway and you re worried about 2mpg then take the cross bars off when not in use. Mileage went from 41 mpg at 65 mph to 40 mpg. 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. Your fuel cost is ten cents mile or 1 500 year.

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 6 l 100 km approx. 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. 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.

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. 42 mpg roof rack with thule dynamic 800 aerodynamic cargo box. Roof rails will not effect mpg cross bars may to some degree and mostly is not only while traveling at a freeway speeds. 40 mpg roof mounted thule xtender 739 ski carrier with skis.

Of course no one in their right mind would drive around with an oversized pool float fastened to the roof of their car while it s.