Ask Honest John

Most recently answered fuel economy questions
Your real mpg lists at www.honestjohn.co.uk/realmpg make very interesting reading. I note that the real mpg values for the 2003 Avensis and the 2009 Avensis are almost the same (1.8 engine), yet the later...
Our 2002 Renault Scenic 1.6 automatic has clocked exactly 45,000 miles. On a recent motorway journey of 150 miles I decided to check the economy and was horrified to find it was only 26mpg. We only use...
My husband is on his third Mercedes-Benz ML. His current ML350 is now three years old and he is starting to look for his next car. He thinks this ML350 has been his best car ever - we use it for family...
My girlfriend is very keen to purchase a Fiat 500 Lounge. She will cover 12-14,000 miles a year of which two-thirds will be motorway commuting, the rest city driving. I am not sure which engine is best...
I have recently retired and want to buy a new Volkswagen Golf. I cover 14,000 miles a year and want a model that’s cheap to run and comfortable to drive. I’ve tested the 1.6 diesel, but can't make up my...
Can you tell me if the average fuel consumption figure displayed by my car's on-board computer is correct? I’ve read a lot of reports that claim official fuel consumption figures not matching up to real...
I want to buy a new 4x4; however, it must be economical and capable of pulling a 2000kg horse trailer. What do you recommend?
I have an 88,000 mile 2007 Mercedes-Benz C-Class diesel automatic estate, a lovely car. I normally follow the fuel filler flap advice and keep to 32F/33R tyre pressures for my lightly loaded lifestyle,...
I have a 2010 BMW 1.8 diesel automatic and was interested in having it remapped/chipped to improve torque and hopefully mpg, which is 48mpg at the moment. The BMW dealer told me that they did not do it,...
I bought a 1999 Nissan Primera 2.0i automatic two years ago. It had 9000 genuine miles on the clock. The previous owner had ongoing health issues and the car was mostly off the road and stored in a garage....