Ask Honest John

Most recently answered fuel economy questions
Two weeks ago we traded in our Ford Focus 2.0 TDCI 138 Estate Titanium for a new 1.0-litre EcoBoost 125 PS, petrol-engined Focus Estate Titanium X. What an amazing, quiet, comfortable car with a performance...
Please advise on best engine choice for a used Focus estate (three to five years old) primarily regarding reliability and economy. Please also advise on tyre type for good mileage.
We are looking to get a second car and would like some advice on what you'd recommend for us. My husband currently does around 20,000 - 25,000 miles per year and that's split equally between motorway and...
What type of petrol is best for a 2013 model, 1.0-litre EcoBoost Ford Focus? I had a Toyota Celica and got 10 per cent better economy when using Shell V-Power. Should I still use V-Power or is Shell standard...
I have a Nissan Primera Sport (1988cc). I tow a Lunar Ultimar 462 MTPLM 1,210kg. I am looking for a small 4x4 to replace the Nissan. I am considering a Freelander 2, Hyundai i150 and Nissan Qashqai. I...
My car requires unleaded fuel, which fuel is best to use? I realise you recommend Shell V-Power, however I do not have the money to regularly fill with this. Which other fuels do you recommend I use that...
I owned a Lexus RX400h, which gave consistent results of 34mpg summer and 33mpg winter. My current Lexus Rx450h (2009 with 70,000 miles) doesn't get much better than 32mpg. It's puzzling as the 400h...
I have a new Mercedes with an 'Eco' button, which cuts out the engine when stationary to save fuel. Surely turning the engine on and off engine wastes more fuel then just idling briefly?
How robust is the PowerShift transmission in a 2.0 Tdci EcoBoost Ford Mondeo? Can I expect it to last 100,000 miles?
I have a 2008 Jaguar XF 2.7 diesel I bought with 50,000 miles on the clock. I am averaging 42mpg. I pride myself on getting every mile from a tankful and arriving on time at my destination.