Greetings! I've been reading about the benefits of using B20 Biodiesel in Classic Mercedes diesels from the 1960s-90s. Owners have credited the fuel with smoother running, better acceleration and significantly lower smoke in the rear view mirror. It would appear the City of London agrees with this view: I'd like to switch to this fuel and believe my OM616 and OM617 motors will thrive after doing so. Only one issue - I can't find any reputable pumping station that sells the fuel. Am I missing something obvious here? Anyone using this fuel in the Greater London Area? Thanks in advance!