Lupo 3L

From the name you may think that this car has a 3litre engine, infact it is called the Lupo 3L because it only consumes 3 litres of fuel for 100km. It does around 90mpg, to me this shows that you don't need fancy hybrid cars to achieve good mpg. You can't buy these in the UK for some reason but a few people import them from germany because of how good they are.