Hello Friends .... I want an expert opinion regarding mileage of my Cuore CX ECO 2007 .... About few months ago my car wa tuned on CNG and I was getting 170 plus km/(50 ltr CNG cylinder) and around 11~12 km/liter on petrol ....... Due to current CNG cenerio ...I asked the mechanic to get my car tuned on both petrol n CNG but was told tht cars can only b tuned either on petrol or CNG ... thn I decided to tune my car on only petrol ... disconnected all the CNG connections etc ..... I am surprized to c tht I m still getting 11~12 km/liter after the tune up ...... I tuned my ride again from ENERCON but the result is same ..... Can anyone help me in this regard that how can I increase the mileage of ma car on petrol .... abt 18-20 ...????