Prashant - 0 ख्याति

I have purchased new Ertiga just a week back. It is CNG version I found that when I fill CNG the gauge at dash board shows full reading. After driving the vehicle few kms. On next morning the reading on the gauge shows less. The same thing is happening when I park the vehicle at the office. Can I know the reason for lowering the CNG level in the tank?

Prashant - ने पूछा की