Passat 2005 Running On Used Soy Oil And B100

I've been filtering my wvo to 5 micron before putting it into the car and I've been seeing better mpg -- about 2 more mpg. The engine also seems to be happier because for weeks I was driving around with the "Emissions Workshop" message hoping that it would go away like I talked about acouple post ago. The SVO I had been using during this time was gravity filtered for a week. Then I built my own filtration device and filtered 10 gallons down to 5 micron. Drove around for like 20 miles and the "Emissions Workshop" message turned itself off. I think it must have been the 5 micron oil because it was the only thing that changed.