Originally Posted by avanti
1) Mercedes forbids the use of any fuel additives, with the exception of cold-weather anti-jel
2) Can you point to any published sources that present data to back up the claim that US highway diesel does not consistently meet MB specs?
[EDIT: Excluding the forced biodiesel in MN.]
3) DPF issues have little to do with the BlueTec failures that plague Sprinters. It is unfortunate that this system limits our ability to idle for long periods, but this is simply a limitation that must be accepted. If the recommendations are followed, the DPF system works fine.
4) Please explain how poor fuel or following the OEM oil-change intervals can cause the kinds of BlueTec failures that we are talking about? These failures are clustered around various sensors and their associated electronics, the DEF-fill reminder system, DEF delivery, DEF tank heaters, and similar. Neither fuel nor oil gets anywhere near these systems. Bad fuel and/or lubrication issues could cause internal failures in the powertrain, but by all accounts Sprinters are very robust in this regard, and such failures are rare. The problem is emissions.
P.S. -- your reference to VW emissions systems is pretty funny.
NO company endorses the use of fuel additives, so what?! I maintain my vehicles based on my own experience and research which has worked out well so far. I also don't assume that manufacturers always have the consumer's best interests in mind. Sometimes they just want you spending money at the dealership for maint and repairs that could be avoided.
These emissions system failures typically result from excessive carbon buildup in the diesel particulate filters (DPF) that the regen process fails to burn off. Much of that buildup can be mitigated by improving fuel quality which improves fuel burn.
Let me be clear, I couldn't less whether you follow my suggestions or not, that's up to you and everyone else here to decide for yourselves. I'm definitely no expert and don't claim to be, but I do have experience maintaining modern diesels and have done so based on my own research and with positive results.
Bottom line, do your own research like I have, instead of picking a stupid argument. It's not my job to convince you of anything. This is an open discussion where we all exchange suggestions and ideas. If you don't like my suggestions, don't follow them. Simple. In any case, I don't know what your problem is, but you clearly have one. Chill!