I've got a 'Check' warning coming up on my Kia Rio's dash.

I have a 06-reg Kia Rio which is displaying a sign saying "Check" which, according to the handbook, relates to the emission control system. I have not detected any change in the performance of the car...

Is it worth using an additive in my diesel?

Do you think diesel additive is worth buying and using? Or would it be better to buy the premium fuel on the forecourts?

Will using a premium diesel help with my Mercedes-Benz E220's running problem?

My 2007 Mercedes-Benz E220 CDI with 49,000 miles sometimes used to feel like it was trying to lurch forward while moving at low speed, without any change on the accelerator. For the last month it is shaking...

Why is my BMW 320d producing blue smoke after I used injector cleaner?

I recently added injector cleaner to half tank of diesel in my 51-plate BMW 320d. I drove it as per normal, refuelled, and then started noticing blue smoke when at traffic lights. Performance seems ok....

How can I un-clog my Vauxhall Zafira's diesel particulate filter?

My Vauxhall Zafira comes up with the warning light for the particulate filter, and a couple of times has almost ground to a halt. Will hard driving help and for how long? Is there a fuel additive that...

Can I run my classic Mercedes-Benz W123 E-Class on unleaded fuel with an additive?

I am buying a 1982 Mercedes-Benz W123 200E. It is in superb condition, having only covered 99,000 miles. Would it be better to run it with unleaded fuel and add lead-type additive, or is normal unleaded...

Are petrol companies adding 10 per cent methanol to their fuels?

Arriving in the small village of Wheaton Aston by narrowboat, I was shocked to find that the garage there had stopped selling petrol at the turn of the year. His reasoning and that of several other small...