I installed a new Racor fuel filter for my 115 Mercury last year and when I first put it on the bowl at the bottom contained crystal clear good ole' gasoline. Since that time the color of that liquid has gotten progressively darker and darker green, almost like oil is in the gas. Of course my oil mixes at the outboard so unless it is getting sucked back through the line to the filter it can't be that. I was wonderin if anyone has a similar problem, is it just bad gas, change the filter (its only 4-5 months old) or what? Any help would be appreciated.