Mater Dei High School in Evansville, Ind., swept Shell Eco-marathon in Houston over the weekend, scoring victories in four categories and achieving a best run of 2,188.6 miles per gallon with its gas-powered vehicle, dubbed 9th Gen.

Mater Dei also achieved the highest mileage in the UrbanConcept class with their soon-to-be-retired gas-powered vehicle George, which achieved 611 mpg. The school’s other victories were in the battery electric and alternative gas prototype categories.

Louisiana Tech University achieved a Diesel Fuel first prize in the UrbanConcept class with a run of 488.7 miles per gallon, and also walked away with the Design and Best Team Spirit awards.

You can see the winners list here, and stay tuned for more video and photos from the competition.