NEW DELHI: After doing everything humanely possible to cut fuel burn, Indian airlines have turned to artificial intelligence (AI) to help save the prohibitively expensive black gold. IndiGo has asked its pilots to save fuel during the time when the aircraft is most thirsty - climb which is done full throttle (car equivalent of the gas pedal being floored) - by opting for “OptiClimb solution” starting Thursday on trial basis on its Airbus fleet.