Delta Cruz on display… Students of the Federal University of Petroleum Resources, Effurun, Delta State, demonstrating their self-built energy efficient car on their campus last Thursday in readiness for the 2015 Shell Eco-marathon competition in South Africa, in October.The Ovie of Uvwie Kingdom in Delta State, His Royal Majesty Emmanuel Sideso, unveiling Delta Cruz on Thursday. Delta Cruz is an energy-efficient car built by students of the Federal University of Petroleum Resources, Effurun, Delta State, in readiness for the 2015 Shell Eco-marathon competition in South Africa, in October.