Some vehicles on Australian roads use 20% more fuel than claimed – which models are the worst?

BMW X3 has biggest gap between manufacturer's laboratory consumption claims and real-world testing in latest Australian Automobile Association data

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Cars driven in Australia consume up to 20% more petrol than manufacturers are claiming, according to a program that tests real-world" on-road fuel efficiency with laboratory calculations.

The Australian Automobile Association (AAA) testing - funded by the federal government - also found four of the 13 vehicles tested in its latest round of compliance checks exceeded regulatory limits for oxides of nitrogen or carbon monoxide.