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Would you comment on the relevance of "official" fuel consumption figures? My Mitsubishi ASX diesel has "official" fuel consumption for country driving of 5.1 L/100 km, but the best we can get, with careful driving is 6.3 L/100 km. I have no other complaints about the car, but the fuel consumption is disappointing. Mitsubishi has checked the car, but could find nothing wrong.
The so-called "official" fuel consumption figures are the result of a laboratory test, they're not real life test results and not meant to be taken as such. Their purpose is to give you a basis to compare makes and models by providing fuel consumption figures resulting from tests done using the same consistent test procedure. Fuel consumption is very hard to pin down with any real accuracy because there are so many factors that affect the outcome, so it would be wrong to take a test result like the fuel consumption figures and assume that applies to all situations.
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