Ask Honest John

Most recently answered fuel economy questions
Is Shell V Power any use?
I drive daily to work six miles and six return, as well as to shops at the weekend. My Polo 1.4 TDI consistently returns 42/44 mpg. Is this good, bad or average? The car is fully serviced. Also, how...
I was interested in your correspondent RY of Peterborough's comments about diesel engines. After 10 years of driving new and nearly new Volkswagen Group diesels and experiencing many of the problems your...
My mother’s current car is a 14-year-old Mitsubishi Colt, which she has always been very satisfied with over the years, but it seems to be nearing its end. This is the shape of car she likes and the other...
Some tell me that coasting downhill in neutral uses more fuel than remaining in gear. However, the MPG computer in my 1992 Corrado G60 says otherwise. Do the same rules apply to both new and older cars?...
I recently took delivery of a demonstrator Toyota Auris Hybrid T-Spirit, first registered in March 2011, which had 2200 miles on the clock. The advertised mileage is 70mpg, but I have only been able to...
We have had a 56 reg Passat TDI140 for 4 1/2 Years and it's always averaged 45-48 mpg winter/summer and alway run really well. There has just been a recall to replace the injectors and we now find that...
When asking for submissions of MPG figures you state: "Work out your average fuel economy over the last month. You can do this from your trip computer consumption meter average, or you can do it on a...
What car would you recommend I buy to replace our Mitsubishi Shogun Pinin? I want similar ease of access that the Shogun provides (to help my back problems!) and would like a more economical vehicle. I...
I have recently bought a Ford Fusion Diesel 1.4. It's one owner with 46,000 miles. I am only getting 43mpg on a combination of motorway and commuting journeys. How can I improve this?