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...