With a flush fitment and wider setup efficiency will be lost guaranteed. Even if it's the same design as factory there will be a loss due to the difference in offset, dimension, and tire sizing. This is why road tripping will call for super efficient wheels/tires but DD tires and wheels if you're not commuting super far I say, "Who cares?" Car is still cheap to charge, awesome handling, and fast. Might as well look good while driving daily right?