indicating a problem with fuel processing or combustion, respectively, but the big warning sign you should be concerned about is if the smoke is colored a distinctive blue. If your diesel engine ...

Petrol and diesel owners are at risk of breaking down or damaging key components by running vehicles with hardly any fuel.

If you're a regular diesel-fueler, you might be used to this warning, but I'm not and wasn't. Since I was curious, I thought some of our readers might be, too. The text of the sticker is as follows: ...

THOUSANDS of drivers across the UK risk being caught out by an obscure rule at the pumps – in a warning by supermarket giants Tesco. Motorists are being urged to abide by a new ...