I haven't found anything called diesel purge by me (southeast Wisconsin) But, I have been 2 gallons of B-100 (Biodiesel) for every other fillup. Plugged my first fuel filter but after that the car runs alot quieter has more pickup, smokes less on acceleration and seems to get better fuel economy. At almost 4 bucks a gallon I really can't afford to put in more but am quite pleased with the results I am getting.

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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
2006 CDI Handed down to daughter
2007 GL CDI. Wifes