Several students from Brigham Young University have developed a vehicle which can return 1,331 mpg US (1,598 mpg UK or 0.17 liters / 100 km).

The vehicle was developed by seven engineering majors at Brigham Young University which were able to create the most fuel-efficient vehicle in North America. They competed in this year's SAE Supermileage Competition where they had to use 20 grams of fuel to race around a ten-mile track.

It tips the scales at just 99 lbs (44.9 kg) which makes it 22 lbs (9.9 kg) lighter than its predecessor. Aside from lowering weight, students also made the lawnmower engine more efficient and increased compression ratio from 8-to-1 to 14-to-1. In addition, they also made the engine fuel injected and electronically-controllable.

The catch? It can reach a top speed of only 25 mph (40.2 km/h).

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