Ask Honest John

Most recently answered diesels questions
I read your explanation on how to benefit from Shell V-Power yesterday. Following your recommendation I've been using Shell diesel in my Ford Kuga 163ps with Powershift since new (now 18k miles) and a...
I currently drive a 2010 Nissan Qashqai 1.5-litre diesel. I see that they now have a 1.6-litre diesel which offers a bit more grunt and better economy. The engine looks very complex and this makes me wary....
I love diesels as they suit the terrain here in southern Spain; lots of steep hills where you do not need to change to a lower gear to easily get up them, but we have to go with the flow I guess. I have...
I'm thinking of remapping my 2006 Renault Laguna 2.0 Dci (150). Is it safe, or would it open a can of worms?
I recently bought my sister's BMW 3 Series E46 (2003) Touring, which had 93,000 miles on the clock. She was using diesel from the nearest garage when necessary to fill up. The car has a full service history....
I have the a Citroen Berlingo with the 1998cc HDI engine. It has nearly 160,000 miles on the clock, and has been fully serviced. Runs brilliantly, except on very short start/stop runs from cold on damp...
I am looking to replace my car with a MPV. The two options I am considering are the Ford Grand C-Max 1.6 Ecoboost petrol or the 2012 Renault Grand Scenic 1.6dCI 130. My main concern with the Renault is...
I'm looking for a new car, costing around £3500, to replace my Mazda 6. I need a diesel for long journeys with good economy, comfort and reliability. I don't do a huge mileage, so a mileage of over 80,000...
I’m looking to purchase a big seven-seater MPV. However I would only be doing 5000 miles a year, mainly for short journeys, so I’m worried about having a diesel with a DPF. Does the 2004 Ford Galaxy 1.9...
What is the best diesel fuel brand for a Ford Focus 1.6 diesel LX 2007?