I have a SVO system set up for my 1983 240D Benz and I use 5 micron bag filters that sit in cut out holes in the lid of a 100 liter poly drum. I cold filter it via filling the filters whenever I happen to pass the drum which sits next to the car in the garage.This is clean oil, pre-filtered at the restaurant to get the big bits out and water-free.
You can get the bag filters via McMaster Carr:
http://www.mcmaster.com/ 9311T21 put the item number in the search bar and it will take you to the odering page with the specs. I just ordered my second set of 10 yesterday.They are 24/7 for the order desk.