Automotive:
How Cars Work - If you need to know, this is your place
Engines - An insight into the engine
Autotrader - One of the best car magazines to go online
Top Gear - Maybe this should be under TV - who knows?
What Car - Online magazine
Car Magazine - Another online car magazine
Carmony- Buying a car? Give this site a look
Servicing Stop - Everything arranged for a service to an MOT