Hey, Revolution -
You ever find the answer(s) to your 10 month old filtering question?
It depends upon your use. You didn't say (stove, furnace, engine, etc).
(For diesel injectors, absolutely no bigger than 10 micron, preferably 2 to 5. I use 10 & 12 micron on my aux. engine oil filter. As much mayhem that can result when a furnace quits, I'd want it mighty clean.)
Kyle posted some very useful data here on Micron Sizes & Particle Filtration
- Link is
http://wasteoilheaterforum.com/index.php?action=profile;u=20and there are some other posts on this board involving filtering.
Shalom!
Cmdr. Ron