Ask Honest John

Most recently answered fuel economy questions
I am looking to buy a small petrol car which has a big range. I have family who live in Currie, Edinburgh, approximately 400 miles away from where I live. I am looking for a small car that can do this...
I have a 1.6 Hyundai Tucson with 39K on the clock. Although there's no apparent fault and it returns 39mpg do I need to get it decarbonized?
Which PHEV gives decent petrol consumption when running on engine alone ie long journey?
What's the best luxury car to buy with highest mpg and is the most fuel efficient and of course reliable because all the Lexus seem to be very expensive for me to insure?
My Kia Sportage MHEV seems to be doing 15% less mpg since the weather turned colder, with the battery power cutting in less regularly despite saying it’s well charged. Is this a fault with my car or something...
I have a Vauxhall Insignia and all seems mechanically sound with 68000 miles on the clock, a recent service and full service history plus new discs brakes all round. When I bought it I was getting around...
What's the best value runabout for low mileage?
I have just purchased a 2022 Toyota Yaris Cross Premier AWD with 18in wheels. I live in Cumbria and although frost and snow do not seem too much of a problem recent years rain certainly is. I am just about...
After six weeks of my VW Passat standing idle I took it for its MoT, which since then has shown a marked reduction in fuel consumption. My wife's monthly trip from Glos to Suffolk registered closer to...
I have a Skoda Octavia 1.5.TSI Evo ACT. These engines are fitted with ACT, meaning when at certain times the 4 cylinder engine reduces to running on 2 cylinders. Do you have any information when and at...