I have seen many posts on different forums about guys griping about gas prices with their big 200, 250, and 300hp motors and some even getting rid of their boats and going to smaller rigs to cut down on gas useage. I have been looking at boats with 90hp max ratings and 50hp max ratings. I have never owned a boat before so i cant gauge gas useage from experience and i cant comprehend the GPH ratings on the performance charts on the outboard websites. Is the gas useage between a 90 4stroke and a 50 4stroke going to be huge? With all the talk of gas prices, im kind of considering the 50hp rigs still, but on the boats i am looking at(aluminum 16' and 17.5ft bass boats) the extra 40hp of the 90 will get me an extra 10mph if not more. Any opinions on this? Also, if i went down to the 50hp motor it would be on a smaller boat with a max rating of 50hp (i wouldnt be putting the 50hp motor on a 90hp rated boat).