Fill  it and see how many litres you get in then compare with total of fuel tank..

You might be surprised 

The Superb II has a 60 Ltr tank but I can only get about 55ltrs in on any refill meaning there is still 5 ltrs after the red and 0 miles left on MFD :peek:

 

I once put 72 litres in the 70 litre tank of my old V70 - it stops counting down at 15 miles but we did another 30 after that...

When I bought my car it was in middle of last fuel crisis, from Bridgnorth. The dealer directed me to the nearest garage to get fuel but they were out of diesel. I then went back to the dealer but they had shut.

I had an 80 mile trip back to Newport and 5 showing on the range but I remembered a garage from the run up to see the car the weekend before, about 10 miles away, so I went for that.

Sadly again no diesel, and now 0 on the gauge, so I headed for home, just hoping for a garage, and driving like Miss Daisy, coasting down every hill etc.

I passed another garage without diesel and felt destined for an AA callout in my new (to me) car. I reckon I went nearly 30 miles on 0 before I got to a garage that luckily had a tanker pumping diesel at that very moment. Good job the seats were leather and easy to clean....