Online chess

http://www.redhotpawn.com/

Petrol additives

A good page explaining why lead was added to petrol in the first place, what engine knocking is, and why unleaded petrol should be used.

http://www.chm.bris.ac.uk/motm/leadtet/leadh.htm


And a good page explaining engine knocking.

http://www.stanford.edu/~bmoses/knock.html


And the ultimate gasoline faq.

http://www.repairfaq.org/filipg/AUTO/F_Gasoline.html

Nice online game (notpron)

http://deathball.net/notpron/