I've been running B-20 for the last several years in everything from JD 8300,4050,4040,2030 tractors 6620 combine and a Case 1845 skidloader. 4 of the 6 have older rotary style Roosa Master pumps and I want to make them last as long as possible.  

Very few fuel filter problems except when I moved a bulk tank around last summer and had a couple issues with clogged filters.

Just ordered fuel today and backed it down to 5% soydiesel mainly because of high prices. 5% should still be plenty adequate to provide fuel lubrication though.