What's the cause of my car's falling fuel economy?

My wife's Toyota Yaris diesel (2011 model) has been averaging around 60mpg since we bought it at 40,000 miles/two years ago. The car has now done nearly 70,000 miles and, over the past six months, the...

Are diesel Volvos problematic?

I've noticed that generally you have been warning users off diesels, with problematic DPFS and EGRS. However, we are considering a new Volvo XC60 D4 Geartronic on a three year lease. We do 12,000 miles...

Is newer better when buying a used MINI?

I'm torn between buying two near identical MINI Cooper Ds: A 2009 model that has air con and cloth seats and a 2007 model which has the whole shooting match panoramic roof, heated leather seats and lots...

Why is my new Qashqai misfiring?

I have a new Nissan Qashqai 1.6 dci manual. I bought it four months ago and it has 2000 miles on the click. However, last week, it developed a "misfire" usually in fifth gear. This currently happens infrequently...

Smoky Nissan Qashqai

My Nissan Qashqai diesel (2007 model) jolts along at high speeds or high revs. There's also thick black smoke emitting from the exhaust. Any idea what the fault could be?

Buying a new BMW - 520d or 530d?

I am looking to replace my BMW 520dSE which has been brilliant (17-inch wheels and sensible suspension). I am tempted to go for a new 530d but common sense says go for another 520d. What would you recommend?

Buying a used car for £2k - is the Yaris diesel a wise buy?

I have been looking for a used Toyota Yaris diesel with a budget of £2000. I have been on the lookout for sometime with very few coming on the market at the price I want. I've seen a couple, with five...

Buying a used Insignia - which model is best?

I am keen to buy a used Vauxhall insignia and have found two that I am interested in. There are both similar in price but I don't know which model to go for. Insignia Excl Nav CDTI Ef 128 or Insignia Se...

How good is Blue HDi 120 S&S compared to e-HDi 115 S&S?

Is the Citroen/Peugeot Blue HDi 120 S&S worth the extra £850 over the older e-HDi 115 S&S engine in, say, the 2008?

Is idling good for a diesel engine?

I haven't owned a diesel car before, but last week bought a 2014 Audi A5 2.0 TDI. A friend advises that I should let this car (with 1200 miles on the clock) idle for five minutes on the drive after using...