Honda City 2005 idsi (Mileage 110K kms) is giving petrol mileage of 11 kmpl in city without ac, while this particular car easily gives around 15 in city. What could be the problem ?
Things checked so far:
-- tappet adjusted
-- stock tyre size
-- throttle clean from Honda
-- the engine is in good condition with regular oil/filter changes
Car is mostly driven on CNG and giving an average of upto 140Kms in 55kg cylinder.