Students from Universite Laval, in Quebec, who made a 'prototype' petrol-powered car that achieved the equivalent of 2,713.1mpg, took home the big prize at this year's Shell Ecomarathon Americas. The competition sees university students design a prototype car that can use various fuels on a test track, in an attempt to maximise its efficiency. Laval's win follows a victory in the 2016 competition, for which it built a car that managed to achieve a fuel efficiency of 2,585mpg. The year before, University of Toronto students took the top spot with a mind-boggling 3,421 mpg. More than 1,200 students - in 115 teams from North and South America - participated in the competition.
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