But if I normally get 60mpg, that's about 20km per litre. So to drive 80km without a flag takes 4 litres.
A flag costs an additional 40 litres over that 80km????
I realise they aren't going to be talking about my car. But it still seems a suspiciously high figure if talking about cars. What did they test it on? A Hummer full of bricks?
(Unless, of course, I've got Wednesday morning syndrome and my maths is screwed.)
Have they change the design of these flags? I don't remember them being the size of a house and made of brightly painted depleted uranium.