The petrol mileage of FABIA is pretty decent as after driving 4000kms now in Delhi & Noida, I am continuosly getting 12-12.5km/ltr of 91 OCTANE petrol with 100% AC on & my driving includes approx.20kms in 4-5th gear, 20kms in 3-4th gear and 10kms in 1-2-3rd gear. I remain hopeful that after 1st service I should get atleast 1km/ltr increase in fuel effeciency so that will take the mileage to 13-13.5km/ltr and also to get rid of the annoying WHINNING SOUND inside the cabin.