Mileage went from 41 mpg at 65 mph to 40 mpg.
Ski roof rack fuel efficiency.
Yes roof boxes and ski racks really do cut mpg.
If you follow our coverage on fuel efficiency you know that real world mileage numbers don t always measure up to the official epa ratings.
Ski snowboard roof rack reviews 1 thule pull top ski and snowboard carrier 2 yakima fatcat locking ski and snowboard rack 3 thule snowpack roof mounted ski and snowboard carrier 4 inno racks gravity snow rack 5 tms j bar ski and snowboard rack.
Adding any rooftop carrier cargo box or ski rack to your car significantly cuts your highway mileage all the time it.
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.
The best ski snowboard roof racks for 2020.
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.
For comparison the additional fuel consumption caused by roof racks is about six times larger than anticipated fuel savings from fuel cell vehicles and 40 percent of anticipated fuel savings.
Do ski racks and roof boxes hurt fuel efficiency.