There is absolutely no reason to give that guy $30 for his report. You can find better information in this forum alone, but there are plenty of other message boards where you can get the same or better info for free.

BTW, water separating filters don't separate water that is trapped in the oil (different from "free water" that separates from the oil.) Another thing is that if the oil DOES have water or coolant in it, it will clog up that water separating filter quickly.

Either use the heat and settle method or buy a centrifuge, but forget the water separating filters. They don't work.

Also, keep in mind that WMO is a carcinogen. Use gloves. Don't spill upstream of your vegetable garden, etc.