They came, they built super-efficient vehicles, gained friends and conquered.

All 105 student teams from 15 nations participating in this year’s Shell* Eco-marathon Asia are going back to their home countries with a feeling of fulfillment and pride. But winners of the four-day race for fuel-efficiency—from Thailand, Indonesia and Singapore—were in an even more festive mood as they garnered the majority of awards. (Related: “In Manila, Students Race for Fuel Efficiency at Shell Eco-marathon Asia 2014.”)

This year’s most efficient vehicle goes to the students of Panjavidhya Technological College Thailand, whose prototype car ran on ethanol. They surpassed last year’s winner with their mileage of 2,730 kilometers—almost the distance from Manila to Jakarta, Indonesia—on a single liter. It is the equivalent of