Geting waste vegetable oil

I get my waste oil from the same place over and over again. This is very important, because I know that it's water free, and I practicaly don't have to do titration. It turned out to be the same everytime I did it. Never have I had a bad batch.
When I bring it home, I let it settle for about 14 days. No filtering is necessary. I simply suck the beautifull oil off the top. Here I must tell you that the oil I get is really clean, so "no filtering" might not work for others as well, but letting it sit still for 14 days really works for me just fine! All the crap falls to the bottom.
Just to tell you how clean my oil is... the amount of lye that I put in the methanol is 4,5 grams per liter of waste oil.
So that's 170 litres of oil, 34 litres of methanol, and 765 grams of lye (NaOH).
This brings me (believe it or not) 180litres of raw biodiesel and 24 litres of glicerol.
Now here comes the funny part.
After bubble washing the biodiesel I get about 170 litres of clean biodiesel. The missing 10 litres must be evaporated methanol and soap in the dirty water (I'm really not sure).
All these numbers were not really measured, so don't hang me by my crackers if I'm off by a liter or two!! These are just my notes!
Also, these notes should not be used as a guideline in producing biodiesel. Methanol and lye are dangerous, and you should educate yourself fully before handling these toxic materials! These are just my notes!