I've read not to use the gas station while the gas truck is filling up the tanks or shortly after. It mixes and stirs the stuff that were settled on the bottom.
Not sure if it's true or not but when I see gas tankers, I move on.
Yep...and those filter often filter as good or BETTER than the filter in most vehicles. I've been delivering gas while a guy was there changing the pump filter. He let me see it...and it had a rating of 80% @ 20 microns on the label. That's as good as the average OE fuel filter.