Quote Originally Posted by woohoo View Post
Hindi naman gumagalaw ang "sucking end" ng fuel system, eh. Kahit full tank pa iyan, sa bandang ilalim pa rin naman ng fuel tank sumisipsip ng fuel. So, kahit full or almost empty tank, there is almost no difference in the amount of dirt being sucked in. Unless of course, you always fill it up with dirty fuel which adds a SIGNIFICANT amount of dirt on every fill up.

I say it's okay. Besides, hindi naman sagad sa ilalim ng tank yung hose na panipsip, may allowance pa rin naman iyan para sa sludge build-up.
Yes, it doesn't move but the sediments are heavier than the fluid they are suspended in so they remain at the bottom of the tank as long as there is a healthy amount of fuel in it. However, as the fuel/fluid goes down, then the system will start sucking dirt that were originally associated with the fuel at the bottom of the tank.

This is the reason I stall the Benz when I drive it below one fourth. After cleaning the filter and refuelling, I'm OK again.