sandy even i agree the car is fuel sensitive, for me hp, indian oil and reliance give fes less by 2-4km/l only bp and shell give good heck when i fill regular gasoline from these two pumps as well fe goes down by 1-2km/l with speed/ super unleaded its the best with speed 97 being even better and costlier.
id really wanna know what methods and fuel hyundai used while claiming the fe, I'm hearing lots of folks mostly from the petrol stable furious about the fe, and hyundai isn't doing anything recently found out even the previous petrol vernas gave bad fes.