Ask Honest John

Most recently answered fuel economy questions
I watched your video on the BMW F25 X3. At the time of making the video the more powerful 3.0-litre engine was not available. Do you have any comments on this more powerful engine? The salesman at BMW...
I always find V-Power fuel to be really good on engine of all the fuels that I have used over the years. Does this mean using supermarket fuels result in less mpg due to higher RPM, more carbon deposits,...
I'm tempted by a Volvo C30 or an S40 to do 8000-10,000 miles per year. But it has to be automatic. Pity they don't do a 1.8 or 2.0 petrol auto. The choice seems to narrow down to a 2.0D Powershitft or...
I've just bought a 2006 Panda Multijet. It replaced a Peugeot 106 1.5 Diesel. The peugeot was slightly bigger, a bit heavier, had an older design indirect injection mechanically controlled diesel, and...
In the Real MPG section, there isn't a slot for the 520d E61 2009 (Tourer). Could it be added it please? Just bought one a couple of months ago, very happy with it but want to contribute.
I have a young family, and now require a larger car but I want it to match certain criteria. I currently drive a Ford Fusion but this is quite a squeeze with 3 child car seats. I have a young baby, a...
I will be replacing my Toyota Aygo soon and I want to buy something that's bigger and has a better specification. Ideally, I want a five door car that’s economical and has rear-wheel drive. It must also...
I watched with disgust a recent 5th Gear programme where Kia's claimed mpg for the new Rio was "tested". The test was conducted by what could only be described as loutish drivers attempting to wring the...
I now have a Kia Cee'd Ecodynamics 2011 but despite economical driving (e.g. 50-55mph on motorways, smooth braking etc) it's only getting about 49MPG. With all the cold weather we're currently having I...
I have just retired and my current car is a diesel automatic Skoda Octavia. The car is okay, but does seem rather noisy on some road surfaces. Our driving will be a mix of pottering about South East London...