Ask Honest John

Most recently answered diesel engines questions
My Toyota RAV4 2.2 diesel is disappointing in its fuel economy and only averages at 27mpg. I would like to have something with similar versatility, comfort and quality, but better MPG. Can you help with...
I would like to buy a 2012 Ford Focus 1.6 diesel, but have read so many horror stories about the PSA 1.6 engine used in these. I've read that there are two versions of these engines, an 8v and a 16v. How...
Do you still recommend Addison Lee for buying a used Ford Galaxy? Just saw some negative comments on other websites. Is it worth getting a mechanic to check them out? How do you choose one over another?
You frequently advocate the use of Shell V-Power Nitro Diesel which I have used in my Citroen C5 from new. You also state that diesel engines are prone to suffering from clogged up DPFs at 80,000 miles,...
I am thinking of buying a Toyota Land Cruiser. I do approx 11,000 miles per year, mostly short journeys but with a couple of 100+ mile round trips a month and a 500-1000 mile round trip every three months...
My 2013 Ford Focus diesel has developed a knocking sound on the gear change between 1st-2nd-3rd. The car has also started making vibrations through the whole car when at idle speed too, it gets to the...
Do you reckon the Jaguar XE diesel is a good option to replace my 2011 Mercedes-Benz C250 CDI?
We are looking for a used car to tow a horse box long distances. The vehicle must be capable of pulling 2000kg plus. We have a budget of around £5000 and have been looking at the Kia Sorento 2.5 diesel...
I have read in a number of places that is a bad idea to run a diesel car on low fuel. Apparently you should never let it go below 1/4 of a tank. Is this correct? And if so, why?
I accidentally put 6.3 litres of petrol into my diesel Ford S-MAX. The car has since been towed home. Should I fill it up with diesel to dilute the petrol, or simply pay a firm to drain it?
 

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