Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
I'm thinking no.for the water holding capacity. when used stationary you can either drain it regularly or add tubing to in another sealed container to increase capacity.
My method of removing water is to heat the oil in a barrel to 150 F for at least 8 hours. The water settles to the bottom and the oil rises to the top. Next, draw the water off a bottom bung in the barrel with a ball valve into a clear hose. Crack the valve open and let the water flow until the stream turns 100% black. I use this method before I gravity drain through 5 sock filters (50/25/10/5/1 micron) and then I pump it back into the barrel and run my centrifuge. Overkill, yes. But I'm a mechanical engineer that over engineers everything.