Apparatuses, systems, and methods are provided for improving fuel efficiency of a vehicle using a mountable wheel cap coupleable to a wheel. The mountable wheel cap includes a center section and an outer section. The outer section includes a plurality of tabs extending outwardly from the center section, and at least one gripper section coupled to at least one of the plurality of tabs, the at least one gripper section including a gripper configured to be placed in contact with the at least one of the outer section and/or the outer lip to secure the mountable wheel cap to the wheel.