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Remember, everything falls to the bottom of the tank. And eventually you get too much crud. Happened to us with diesel. Had to change all of our tractor fuel filters.
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For those without powered fuel pumping, the easy rule is to avoid jostling the can/tank, and not pouring out or retrieving fuel from the bottom of the tank when filling something.
With cans, I will pour out 90% smoothly, and the last 10% or so gets dumped into one can, where it eventually accumulates and all the crud ends up. This will eventually settle out as well and you can pour out most of it without crud in it.
With a 15 gallon container, I just use a kerosene siphon to retrieve fuel which does not reach anywhere near the bottom of the container. So I can get out 2/3 or so out without problem.
Then a filter funnel helps for filtering out the crud from the gunked up fuel. Always good if you can use it 100% of the time, but not always easy to use in vehicles with an angled fill location. I found a large angled metal funnel that the filter funnel can fit inside of, otherwise there is no way for one person to use a filter funnel while fueling my vehicles. So that metal angled funnel + straight filter funnel combination is pretty useful.