Hannes,
Don`t look at WTI or Brent futures - you will have far too much basis risk on the crack.
To hedge your Rotterdam bunker requirement of 2KMT p/month, you should use the Rotterdam 3.5% Sulfur barge swap.
This is a simple swaps instrument on the wholesale price of 3.5% sulfur HSFO traded in a highly liquid market. In fact the volume of RDM3,5% swaps traded is more than 10 times the Rotterdam bunker market - you can very easily trade it.
For 2KMT either trade a full calendar 2008 (RDM3.5 CAL08) at 24KMT or trade the months individually, 12 times per year. To gte an effective price, call Gunnar Lindqvist at IMAREX in Oslo on +47 2389 4220.
For Houston you can use the USG3.0% Waterborne FO swap, which also trades in a liquid wholesale market. The counterpart to your tarde will likely be one of the oil majors or big bank.
If you have a clearing account with one of the big banks, you can get your trade cleared at NOS or NYMEX Clearport to avoid credit risk issues througout the period. If not, you will have to trade your requirements OTC - Over The Counter.
I am attaching a curve showing the historical movement in the RDM3.5 CAL08 contract over the past year. You can now buy it at around USD 355 p/MT as a hedge against higher prices.
Hope this helps - let us know if you need more.
Mikal Bøe
Managing Director
IMAREX Asia Pte Ltd