You know the bit on the car dashboard that says how many miles of petrol is left?

[chriswill]

The one on my mini changes if you take a right hand bend. Plus it only reads half full when its brimmed.

I carry a small garden bamboo cane for if i need to see how much fuel I have left.

 

[davesgcr]

Bottom of a diesel tank can get a bit cruddy i believe.