如何让车得到40 mpg 以上的油效，大部分新车都可以

https://www.caranddriver.com/features/g19746506/every-nonhybrid-car-that-scored-40-mpg-and-higher-in-our-real-world-highway-fuel-economy-test/

这里Camry 测试结果是highway 75mph，45mpg