Ask Honest John

Most recently answered real mpg questions
My Toyota RAV4 2.2 diesel is disappointing in its fuel economy and only averages at 27mpg. I would like to have something with similar versatility, comfort and quality, but better MPG. Can you help with...
How much of the fuel efficiency of a 2016 Prius Plus would you say is due to the different elements of (1) the Atkinson cycle CVT engine (2) hybrid battery system (3) and just the fact that you can't drive...
I understand that Volvo has updated its D2 engine in the past year and its is no longer a 1.6 but it is a 2.0 engine. Is there any data on how this has affected the Real MPG of the V40 and V60 models?
Your Real MPG figure seems about right for my car, but do you take account of the fact that there seems to be about an 8MPG difference between summer and winter? My Prius will do 59MPG in the summer and...
I recently purchased a 2009 Vauxhall Insignia 2.0 diesel with 140.000 miles on the clock. It has a full service history and drives well. However, the fuel economy isn't very good. I average 36mpg, yet...
I was reading the engine specification for the new Audi A4 2.0 petrol auto. It just seems incredible. 53mpg. 0-62 in 7.3 secs. 190ps and yet only £30 per year in VED. What engineering wizardry have they...
I have very recently passed my test and am due to start new job in two weeks time. I will be commuting 500 miles a week, so need something with great MPG which can handle motorways. It will also need to...
My Mazda 3 1.6CD DPF avreages only 30mpg in the city,and around 40-50mpg combined, what would be cause of this?
I am measuring the fuel consumption of my brand new car I found that the trip computer gives 4mpg better than the calculation of the miles travelled from full tank to full tank. Honest John's Real MPG...
Back in March 2015 I asked you: "I bought a 2012 Honda Civic 1.8 EX i-VTEC in February, swapping it for my 2006 2.2i-CTDi. The overwhelming 'feature' of the new car is its enormous thirst for petrol and...