Friends! I am using 2013 Mehran..While driving from Lahore to Rwp on GT road at speed of 90-100 it gives an average of 17.5-18.9km per litre...In city it gives an avg of 16-17km per Litre...Its avg also varies with speed e.g at speed of 100+ on motorway or Gt Road its avg reduces to 16-17Km per Litre...so honeslty I m not feeling any difference in EFI and Simple Mehran,as My 2008 Mehran is giving me almost same avg.