Folks,
Just for some general information on the G55's, here are the production numbers for the US models:
2003 572
2004 294
2005 921
2006 393
2007 381
And picking up on PM's advice

, I do have friends that buy their fuel at a discount as they work for companies that buy through fuel farms for their fleet vehicles. So yes, it is possible.
Again, good luck on your search.
Cheers!
Mike K.