Fuel tank has a huge reserve - normal??

[rfn]

The fuel light came on the MX for the first time today... I drove about 15 miles with the light on before I got to my favourite Shell garage.

I managed to squeeze just over 40 litres in the tank. I thought it was supposed to have a 50 litre tank - having 2 whole gallons in reserve seems an awful lot? Is this right or is my fuel light not working correctly?

[rfn]

Yes, it's an '04 Sport - loving it! I put up a thread with some photos in Readers Cars.


Cheers for the replies - guess I'm just lucky to have a fuel light at all!!