I have heard many opinions about low sulfur diesel fuel (Euro4, Euro5, etc…) and classic high pressure fuel pump (rotational). There are two factions: one that believe that sulfur is lubricant for these pumps and other that believe that sulfur is not lubricant for these pumps. So, I would ask you people what is the truth actually. Please don’t quote some quasi scientific interpretations, I have heard them enough for entire seven lives. My question is simple, will new diesel fuel with no sulfur (<10ppm) damage classic diesel fuel pump (bosch)? I mean, aren’t there in any additives in diesel fuel that are responsible for diesel engine lubrication?
I know that this maybe the question for car&maintenance, but there are many mechanics which are presenting their life phylosophy, and fuel distributor lobbies’ members which will confuse the whole world again with their conradictory answers.