I know it's hard to track numbers for removing something as fickle as a xbar on a roof rack but it seems that with the grill block allowed for almost 5mph faster 60 vs 55 to obtain 22.5 mpg. So 4-5 mph achieved the same mpg. Mind you this is with oil temp never breaking 170°. When all the way to operating temp it will run closer to 24 at least pre mods. Haven't had an opportunity to get it out lately. It's summer can't help but enjoy the Cruze getting 60 mpg. Will update when I get it out for more than 20 miles.
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