My car misfires every few weeks - why does one spark plug always get oil on it?

Every few weeks I have to take the same spark plug out to clean oil off of it because it starts misfiring. Could you please tell me what the problem may be?

Why is my car pinking under acceleration?

My 1999 Toyota MR2 seems to be rattling/pinking under acceleration. I’ve checked the timing and its spot on at 10’ BTDC. Can you suggest any other issues that could be causing it? It was recently serviced...

My local dealer charged me for work that wasn't done - what can I do?

My local Subaru dealer recently charged me £400 to replace the spark plugs on my 2005 Forester. They charged three hours labour as they reckoned the plugs were seized. The car was still idling badly so...