(CBS) — It’s all about the gas mileage as students from Northern Illinois University prepare for a competition next month.

Last year, a team from NIU was able to achieve more than 1,300 miles-per-gallon on their prototype car involved in the Shell Eco-Marathon competition. This year, the team is putting a lighter carbon-fiber body on the car used last year in hopes of getting up to 1,800 miles-per-gallon.

READ MORE: Mother Has Questions After Police Shoot, Kill Man They Say Was Wielding Knife In Englewood

Northern Illinois University team member Kevin Kuebrich says the competition this year will be in Detroit and run 30-to-40 miles.

“They give you a set amount of fuel at the beginning of the race” and at the end of the race, the fuel is weighed, the difference taken into account and the miles-per-gallon calculated, Keubrich says.

READ MORE: Chicago Weather: Rain Coming As Work Week Begins

Kuebrich says last year’s winner had a pill-shaped car that went almost 2,000 miles per gallon.

The 26-year-old NIU says the team’s pill-shaped entry sits about a foot and a half off the ground and is 10-feet long and three-feet wide.

MORE NEWS: Farmers Market Vendors Pleased As Open Boulevards Program Kicks Off In Logan Square

The Shell Eco-Marathon is in Detroit from April 9-12.