I'm just saying you have to compare apples to apples. My diesel Peugeot 306 1.9 did about 45mpg no matter how hard I drove it, whereas my friend with the same

I'm just saying you have to compare apples to apples. My diesel Peugeot 306 1.9 did about 45mpg no matter how hard I drove it, whereas my friend with the same model with a 2L petrol engine said he was using roughly twice as much fuel as me. The later common rail 2L version was supposedly capable of 55mpg