The amount of AdBlue used depends on the type of driving being done and the number of miles covered. Audi says its A4 saloon has a 12-litre AdBlue tank that gives it a range of approximately 6000 ...

FRANKFURT, Sept 7 (Reuters) - Supplies of exhaust cleaning fluid in Germany needed to keep diesel vehicles on the road, were thrown into doubt on Wednesday as one of the country's largest makers ...