from Nov to Feb a Cultus gives approx 135KM / cylinder fill. Aircon works during day.
from Feb to Nov the same car give approx 110KM / cylinder fill aircon is always on.
whatever comes from the factory in a car does not overload engine. after market stuff does.
-
2ndly for max performance on CNG the pressure at station makes the difference.
to my experience, best time for CNG fill is early in morning between 7 - 8 am & between 4 - 5 PM in evening. Thats when pumps have max of pressure.