Ask Honest John

Most recently answered fuel economy questions
Our Volkswagen Golf is coming to the end of its life after over 170,000 trouble-free miles and we'd like some advice on getting a new MPV. Whatever we buy we want to keep for another 10 years at least....
I have a Hyundai Terracan 2.9CRDT manual. It has 118,000 miles on the clock, I'm lucky if it is worth £4000. The Terracan does 22-24mpg and I need something with better fuel economy, reasonable ground...
We are looking at purchasing a replacement car for my better half. Annual mileage circa 12,000, consisting of four daily 30-mile commutes on dual carriageways and very little long distance motorway driving....
Let me state straight away that I'm not a Nissan salesman and have no connection with them, other than having owned my Pathfinder for just under 3 years and 62,000miles. I just wanted to let you know my...
I have often thought that the mileage taken for the fuel gauge to noticeably drop below the 'Full mark', after filling the tank, can be quite variable - suggesting that the nozzles on the pumps are not...
We have been looking to buy a 2-3 year old Mercedes A170SE auto for £10,000 - £13,000. As we want a light coloured interior and they are as rare as hen's teeth we have been offered a brand new A180 elegance...
My wife is nagging me about the mpg of our 2009 Qashqai 2.0dci. I told Nissan we were disappointed compared with our 2001 Scenic 1.9dci, but got a non-committal response. The computer is indicating 36.7,...
I need to replace my Volvo S80 and have been looking at the new, very fuel-efficient diesel engine cars (Blue Motion, Greenline, Volvo Drive-e etc). But the problems with DPFs and dual mass flywheels are...
I have 10k max to spend on a car. I need it to be economical but nippy. It has to be roomy and safe, reliable and cheap to service as I commute 16,000 miles per year. I want something that's fun to drive...
Twice in the past year you have answered a similar question to 'is it economical to coast in neutral down hill'. Both times your answer is wrong! Of course you are correct that in neutral the engine is...