Ask Honest John

Most recently answered fuel economy questions
Please advise if the use of cruise control on my 1.9SE TDI VW Passat Estate gives a better fuel consumption over and above normal accelerator use on long and motorway journeys.
I have recently purchased a Sept 2006 Toyota Avensis Estate 2.2 D-4D 180bhp. The car has 88k warranted mileage and full (Toyota) service history. I bought it via a car auction and a good local garage just...
I have a 2006 Volvo S40 with 1.6 diesel engine. You suggested this engine in preference to 2.0 litres. It has been economical (average of 48mpg for mixed motoring) and very satisfying to drive. In the...
I purchased a new Golf 1.4TSI DSG [7-Spd] on 2-9-2009. It is used for long and short trips and I use Superunleaded if available. It does not live up to its claimed mpg. The brochure shows urban 37.7 extra...
An article in yesterdays paper that recommends, "Never coast in neutral; idling uses more fuel than running in gear on a closed throttle.” I don't understand how this can be. If you go down a hill for...
I drive a Subaru Forester automatic with cruise control. Having been widowed recently, I'll possibly change to something smaller at some time in the future. What effect on petrol consumption does an automatic...
My wife and I wish to replace our automatic car, which is now only used for short journeys covering approximately 2,000 miles annually. Reading your weekly column avidly every week you seem to recommend...
I own both a 2001 E320 CDI estate and a 2003 E320 CDI estate. The engines are ostensibly the same, the earlier one generating 194 bhp and the later one, 204. Fundamentally the later car gives significantly...
Could you please let me know what you think are the top three automatic 4x4s based on the lowest petrol or diesel consumption.
I wonder if you can give me some advice, last April I purchased a new Smart ForTwo CDi, primarily based on its published fuel economy of 85.6mpg, or 621 miles without stopping. I am deeply disappointed...