Ask Honest John

Most recently answered diesel engines questions
At the moment I have a 56 plate Peugeot 307 diesel and do only about 5000 to 6000 miles a year. I am retired, 68, looking for something economical with five doors, petrol or diesel?
I read that you stated that modern diesels are unsuitable for successive runs from cold, which I fully comprehend, but how does diesel drain into the sump as a consequence?
On Saturday evening, with the distance to empty stating 40 miles on his 2002 Audi A4 1.9 TDI estate, my father misfuelled, putting approximately 25 litres of unleaded into the tank before realising. He...
I purchased a Fiat 500 1.3 Multijet 2 years ago. During that time the car has been in and out of the garage for diagnostics, reputedly due to engine management lights. It has regular servicing but no one...
I am seriously considering the purchase of a high spec BMW 320d auto saloon F30. The car is eight months old, has covered 1300 miles and is an ex-Olympic fleet car. Assuming that the 1300 miles will have...
My partner is driving me to distraction, he always said when he retired he would buy the youngest S-Type or similar F-Type. Now retired he cannot make up his mind whether to keep his Volvo S40 saloon or...
Having already had engine problems with a Toyota Avensis 2.0 D4D, purchased new in April 2007 (lower engine replaced at 2 years old due to high oil usage - replacement did not resolve problem - plus EGR...
My daughter runs a 2007 Volkswagen Passat 2.0 diesel Estate but no longer needs the space and needs to carry two smallish dogs and one husband. She doesn't want to buy brand new and only does 10,000 per...
Does the Volkswagen Tiguan 2.0TDI 170 have a supercharger and is that likely to cause any problems?
Apparently short trips are not good for diesels. At work we use the Platinum Plus additive in our delivery van to make it burn off the soot in the DPF at a lower temperature. Our drivers report that performance...