The fuel surcharge percentage for FedEx Freight® services is based on the weekly published national U.S. on-highway average price for a gallon of diesel fuel. FedEx GroundFuel Surcharge Rates Effective DateFedEx GroundSurchargeBased on Weekly Fuel Price Reported for*Feb. 22, 2021–Feb. 28, 20217.00%Feb. 15, 2021Feb. 15, 2021–Feb. 21, 20216.75%Feb. 8, 2021 *There is a lag between the fuel price index and.