Supercars aren't known for their amazing gas mileage. However, in recent years, thanks to hybridization and turbocharged engines, these manic machines have been steadily increasing their range and fuel economy. That is not the case with the almighty 1,500-horsepower Bugatti Chiron.

According to the Environmental Protection Agency, which rates every vehicle that drives on U.S. roads, the Chiron returns a scant 9 mpg in normal city driving and just 14 mpg on the highway. That comes to a combined rating of just 11 mpg.

Although normal folks are likely to balk at such figures, the ones who can afford the Bugatti Chiron's ludicrous $2.5 million price tag likely won't give the poor miles per gallon rating a second thought.

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What is interesting is the Bugatti's 9.1-gallon fuel tank. We've already been told the Chiron will decimate its fuel reserves in a few short minutes when driven flat out. But we've never been told how far you could actually go just pootling along until now.

The EPA states that using the combined mpg figure, the Bugatti's fuel tank will last just 100 miles—at best. That's essentially hypermiling a $2.5 million hypercar.

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For perspective, the current-generation Nissan Leaf, a fully electric family hatchback, has a range of 107 miles and has only 107 horsepower, or 1,393 less than the Chiron. Bugatti owners, however, aren't likely shocked, as Veyron owners saw just 8/15/10 mpg city/highway/combined.

Maybe the solution to the Bugatti Chiron's fuel issue is building a custom roof rack and adding a second 35-gallon fuel tank on the roof? You'd definitely get farther, but then again, we doubt it would be able to hold up to the environmental forces at 261 mph.