I have Cultus 2004, non efi, it gives me
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Petrol - 22.5 km/L on motorway (with speed of 100 km/hr, Rpm 2.8-3.1)
Petrol - 15+ local
CNG - 220 - 240 km (Long route, 55 kg Cylinder), even 250 km twice on GT road
CNG - 180 - 200 km (Local)
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All without Ac
Only reason to keep this cultus is economy...
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Also my colleague has 2007 non efi cultus, with 60 kg cylinder, he gets 250 + km local, with light foot...
One cousin has cultus 2001, 50 kg cylinder, gets near to 300 km in 1 cylinder, he drives the car at 60 km/hr...