Ask Honest John

Most recently answered mpg questions
I'm looking at the Dacia Sandero, which would be my first new car. Although the Access spec suits me fine, it seems the Ambience with the more efficient Tce 90 engine makes sense. At 6000 miles/ year,...
I decided to fit winter tyres this year, and now use Avons on 16-inch steel rims to replace the original 17-inch runflats on my BMW 3-Series. As expected, grip is great, but there is also a very noticeable...
My wife has recently purchased a pre reg Fiat 500 at a very good discount, my question regards the stop start system. Do you think it is a gimmick or does it have any real purpose. it strikes me that the...
I am told that the most fuel efficient way of driving in any gear is to drive at or nearest to the peak torque rpm for the engine, is this true? If not what is the peak torque rpm best used for?
BMW 320d Sport Steptronic - is the fuel economy as good as they say? I'm looking at one tomorrow.
We have just bought a Fiat 500 Abarth for my wife. It's the standard car with leather, opening glass roof and climate control. Nothing else is needed, defintitely not the 17-inch wheels. It is terrific...
I drive an Audi A3 1.6TDI, driving 20,000 per year with fuel economy on motorways between 58mpg and 64mpg depending on weather, temperature and traffic conditions. After 38,000 miles I replaced all four...
My mother recently had her reliable old Ford Fiesta written off after a car hit her. She has replaced it with an S-reg 1.6 Volkswagen Golf, but is only getting 26mpg. She bought it from a recommended local...
For nine years we drove a Skoda Octavia 1.9TDIs. We downsized to a Fabia 1.6TDI expecting to get increased mpg but have been sadly disappointed. The Octavia usually averaged 52-54mpg and sometimes almost...
I recently bought a 1.4 Vauxhall Meriva which ticked all my boxes, including a miles per gallon claim of 47. Having tested it over the first 1500 miles of mixed journeys I only achieved 37mpg. I went to...