LAWRENCE, Kan. (AP) _ Gas station visits would be rare if a group of University of Kansas students is successful.

Professor Chris Depcik (DEHP'-sick) and his mechanical engineering students are trying to design a vehicle that could travel 500 miles on one gallon of fuel.

The goal is to build several modular-type engines that run on different types of fuels, including bio-fuels, diesel and natural gas. The plan calls for the engines to be interchangeable with the same car. For the project, the students are using a 1974 Super Beetle that was donated to the school.

Depcik doesn't know how long it will take to develop a 500 mpg engine. But he is confident the goal is achievable.