After carrying out an oil change, the sump plug is leaking - could it be because I used a metal washer?

After carrying out an oil change, I have a leak from the sump plug. I used a metal washer from the filter pack, not a copper one, as I would have expected to seal the sump plug. Could this be the cause?

The engine in our car keeps cutting out and losing power - what's wrong with it?

Our 2007 Ford Fiesta 1.4 TDCi broke down on Sunday evening. The engine cut out at 75mph. It started up again and revved fine, but came up with 'Engine System Fault' and an Amber Cog with and exclamation...

The gears in my Vauxhall Corsa sometimes won't change - can you help?

When driving my 2008 Vauxhall Corsa, the gears intermittently lock and I'm unable to change gear (up or down). My gearbox is manual and when the problem last occurred I had to complete my journey in second...