Ask Honest John

Most recently answered real mpg questions
Just to add to the debate about the 500 TwinAir, my daughter has been running one in London for a year now, and has done 5000 miles. Average fuel consumption is 33.3mpg according to the computer - and...
We have recently bought a new KIA Venga 3 automatic for which the consumption figures were quoted as 48mpg for a long run. We've never had trouble achieving the claimed for mpg in any car in the past....
I own a Volvo XC60 D3 Manual Drive, which I bought new in October 2010 and which has completed 12,000 miles of almost exclusively extra urban runs at 60-70mph in sixth gear. Whilst it is a lovely car in...
I recently bought a 1.8-litre petrol Mazda 6. The ‘info’ button reveals I am achieving between 42 and 43 miles per gallon. How accurate are these in-car gizmos at calculating miles per gallon?
I suppose it's fair to say that all the EU fuel efficiency tests are carried out in the way described on the car fuel data glossary at www.directgov.co.uk - a rolling road, simulated drag, no gradients...
Last November I bought a Vauxhall Astra 1.7CDTI Eco with a claimed combined mpg of 62.8. I struggle to get 45mpg, which is more than 25 per cent less than the stated figures. I wrote to Vauxhall expressing...
My wife has just purchased a new Nissan Juke automatic 4-wheel drive from Charles Hurst, as her health dictates an automatic. Nissan states combined fuel consumption is 37.2 mpg and extra urban of 47.1....
Why do you think my wife's Hyundai Getz 1.4 CDX automatic is giving such poor mpg? It averages just 27mpg and although it is only used around town we are disappointed. It is a 2007 car, has 11,000 miles...
The mpg on my Alfa Romeo Giulietta 1.4 MultiAir TCT has worsened to a combined 26.4mpg. I have just got it back from the dealer today after having it checked and they have said there is nothing wrong with...
Which is better for mpg? A 6-year old BMW 330CI auto or a 6-year old BMW X5 Sport 3.0 petrol auto?
 

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