I mainly take issue with the word “guzzle”. When something “guzzles petrol”, I expect it to be choking down something like twice as much petrol. Not 7 percent.

7 percent is basically 4.0 versus 4.28 litres/100km. In a motor vehicle that’s the difference between careful driving and slightly less careful driving. Or the difference between a motoring magazine’s figures and factory figures. It’s not “guzzling extra fuel”.