Salaam,
I heard that Corolla 1.3 gives good mileage in CNG (I am Honda City User). also it has truck which is good enough.
From few days, I am digging regarding which car i have to buy which is fuel efficient for daily 60 KM drive.
like Honda city, Passo, Vitz, Corolla....
I couldn't find out an clean Honda city idsi till now. One I purhcased have issues in engine 
Now I narrow my search to Corrolla due to ...
+ve points for corolla are
1- CNG
2- Parts cheaper than honda
3- parts easily available, either in city or in Village i.e. SWAT/Naran/Gilgit road too.
4- It has Trunk, Cultus doesn't have
5- Its a Highway car too.
Need informations :
1- Which models are successful in CNG
2- what is the fuel avarage in Petrol
3- what is the fuel avarage in CNG
4- What aboout Engine Overhaul, like in Honda City, we will change/swap its engine or can overhaul.
5- Suzuki Cultus and Corolla 1.3 CNG and Petrol consumptions are same ????
6- Cabin voice with comparision to Honda city idsi as honda city is mute while driving.
7- May I install CNG on GLI/Automatic too and what will be cng and petrol average ???