"On June 18th 2007 I bought my first diesel vehicle, a 1983 Mercedes Benz 300 Turbodiesel with 232,000 miles on the clock.  My plan for the car was to run it off B100 from day 1 and get a first hand idea what happens when you switch a high mileage vehicle to pure biodiesel.  Currently, I have racked up 2,2000
B100 miles on the car.  I've noticed the motor runs slightly quieter and the car only smokes on cold start up for 15 seconds or so, much less than when I test drove the car before buying.  The first thing I did when I bought the car is change the fuel filters.  The Benzes have 2 filters a primary and a secondary (pictures attached).   I installed the primary filter 1 the day I bought the car.  You can see the biodiesel has acted as a solvent by releasing deposits from the fuel tank and lines into the filter.  Primary filter number 2 was installed after 1,000 B100 miles.  You can see the filter is much cleaner.  The next picture shows the 3rd and current filter installed and it seems to be very clean with just a few specs of debris inside.  My advice to folks with the high mileage diesels wanting to run biodiesel would be to change the filters out frequently the first few thousand miles." 

Dave, Fayetteville, AR sales and techsupport guru for Evolution Biodiesel