Brother even at 90km/hr and super smooth motorways the D16W9 engine or even the D15Y3 will NOT give above 15km/l even if someone say that the car was being driven by a 30 kg driver and zero cargo load.
15km/L already translates to nearly 40 MPG which goes into the territory of Hybirds.
I have kept nearly 20 cars of 2001-2006 model including a Hybird and I know that as a fact.