Whilst I think that this is an important consideration. Indeed I should imagine that relatively lower fuel usage is one of the major reasons for interest in a catamaran for many enthusiasts. I think that with the larger boats where, initial costs and other incidentals such as mooring and insurance are much higher, the fuel cost must be put into the picture as a whole. As an example, if one were to pay $200k less for one boat over another; that capital could be invested and the interest alone would buy you 6000 gallons of fuel a year. regards Jonah. http://www.jonah-art.com