As I was driving, the fuel tank indicator went close to empty and the (fuel empty) warning indicator lit up, which was fine. But When I added 15 litres, the needle didn't move. The low fuel warning is still there and the needle is still at the E (empty) mark? Honda workshop person is not surprised, says such thing is common - if sufficient fuel is not added, the needle may not move up.
Is this credible? Any advice?