I changed out the fuel lines in my boat the other day and man did that fuel look old. It was orange coming out. Lol The boat has been sitting since around September and didn't start getting used until about a month ago. What's better run the old fuel out until it gets low then fill up with fresh stuff? I want to guess that it has around 40-50 gallons in it now. Gonna use the boat this weekend and burn through most of this fuel. I just don't know if I should fill it up before or after. Apparently the boat doesn't burn much. 12-15gph seems to be the average.