When I bought a car, the salesman told me that if it's freely turning around, it's locked. If it's stiff to turn, it's unlocked, you just need to turn it after removing the key.

 

Now after leaving a car parked somewhere for 1 month, either I've forgetten how to open the cap or it's stuck.

 

What happened was that I unlocked the cap (a click after key turn anti-clockwise). After removing the key I tried to open it up by turning clockwise, it became very hard to turn and it keeps making that clicking noise as I turn it.

 

So, is it broken or am I doing it wrong?

 

I need urgent answers as fuel tank in the car is nearly empty.

Try pushing the cap & turning the Cap Anti Clockwise.

Lefty loosey, righty tighty.

Thanks! It was actually stuck. Glad I managed to get it loose!