Shell Lubricants Eco-marathon Competition
High school teams work on their entries in Shell’s Eco-marathon mileage challenge April 20 at Sonoma Raceway. The event drew teams from 99 schools.
An entrant in the Shell Econ-marathon mileage challenge makes it way around the Sonoma Raceway track on.
Team members push their entry to the starting line for the Shell Eco-marathon mileage challenge.
