Although a freeze on engine development imposed at the end of the 2006 season means teams are unable to alter the fundamentals of their engines' design, the competition to have the best engine on the grid is still intense. Rob White, Renault's engine technical director, discusses fuel economy, the French team's relationship with Red Bull, the demands of a 19-race calendar and the prospect of a major powertrain change for the 2013 season… (Full Story)