Keith, I hate to disagree with you, but I would never pour dirty fuel back into my tank, even after the solids had settled. When we change the oil and filters in our boats, we put the little bit of fuel from the old filters into the sme recycle tank as the used oil. A couple of pints of fuel will not hinder the recylcing of the 8 gallons of used motor oil. I keep several 5 gallon buckets at the house that I use for recycling. When they are all full, I take them to the marina or to the auto parts store and dump them. Since I do all of my routine maintainance on several tractors, boats, and other vehicles, there's always plenty of used oil to dilute what small amounts of fuel that come from draining water seperators and changing fuel filters.