Congrats to 72o, you think he's played this game before.
The Texaco comment had me hoping a few USA questions would have been burned off early. The Caltex comment had me looking as I had no clue what it actually was. That apparently was key. I wasn't sure if it was too obvious of a clue. If you happened across this link from their website, it could have been found quite quickly.
http://www.caltex.com.au/about_contact.asp