Mercedes Man: Yes a coffee filter would work, I used them myself in the early experimental stages of my fuel making. HINT: it will our through much faster if the oil is heated!

Engatwork: I don't have possession of the digital camera right now, my wife ( more likely my daughter) took it with them when they left last summer. However I can post a link here that will take you to where I borrowed the idea from! http://home.swbell.net/scrof/Biod_Proc.html This is a very elaborate system, but you can do the same thing with a small pump. Also you don't need 2 filter tubes, one will suffice.

The oil I collect doesn't require heating at room temp. to "flow". The reason for heating the second tank and the lines is this; veg-oil is a much higher viscosity than diesel fuel, by heating it to 165°F it reduces the viscosity to where it needs to be to properly flow through the IP and injectors. ( It would "coke up" the injectors if just used cold)

Yes, I use solenoid valves to switch tanks, got one from JC Witney then discovered I could get them cheaper (same valve) locally.

FOR you guys that just want to filter your used motor oil try this if you want something other than a coffee filter. Get a 5 micron bag filter and use a section of 6" woodstove pipe, set the bag filter into the stove pipe and fasten with a rubber band or piece of wire. ( the filter should be able to stretch enough to have the top pull over the outside and then fasten) you can then either drill holes in the bottom of the stovepipe or cut slots in it for the oil to run out of. Set this in a 5 gallon bucket and just pour your used oil in the top of the pipe. It will go through the filter and into the bucket, when it hits the bucket it's filtered to 5 micron! Tom