Originally Posted by Jaqun
I was thinking more of the crud at the bottom of the gas tank
That isnít going to move just from you running your engine
If there is crud maybe you need to get it out.
Usually a dip tube is at least an inch off of the bottom, running your engine will draw a few gallons of fuel an hour through that tube, engine will burn a little and most is returned to the tank.
Itís nowhere near enough volume to stir the tank at all.
Going sailing with the tank half full may well stir things though.