I've been reading about the use of biodiesel in the om642 and as most are aware, the North American owners manual suggests no more than 5%.
So why the limitation? We know the price of crude is going nowhere but up.
I suspected the DPF as being the issue, so I read an article on the DPF and biodiesel...
http://biodieselmagazine.com/article.jsp?article_id=1247&q=&page=all
Essentially, biodiesel is good for the DPF.
Moving along, it seems biodiesel is bad for motor oil when the biodiesel makes it way into the crankcase via post-injection.
http://biodieselmagazine.com/article.jsp?article_id=2290&q=&page=1
My understanding is that post-injection occurs as a result of the om642 when it begins the regen process to clean the DPF. So even though the DPF is biodiesel compatible, the post-injection process leaks biodiesel into the crankcase and slowly kills the lubrication properties of the 229.51 motor oils? Has anyone else seen similar claims?
If this is true, then my guess is that a DPF elimination or "switch" via reprogramming the ECU is required to stop regens while biodiesel is in the tank. Does that make sense or am I on the wrong track?
So why the limitation? We know the price of crude is going nowhere but up.
I suspected the DPF as being the issue, so I read an article on the DPF and biodiesel...
http://biodieselmagazine.com/article.jsp?article_id=1247&q=&page=all
Essentially, biodiesel is good for the DPF.
Moving along, it seems biodiesel is bad for motor oil when the biodiesel makes it way into the crankcase via post-injection.
http://biodieselmagazine.com/article.jsp?article_id=2290&q=&page=1
My understanding is that post-injection occurs as a result of the om642 when it begins the regen process to clean the DPF. So even though the DPF is biodiesel compatible, the post-injection process leaks biodiesel into the crankcase and slowly kills the lubrication properties of the 229.51 motor oils? Has anyone else seen similar claims?
If this is true, then my guess is that a DPF elimination or "switch" via reprogramming the ECU is required to stop regens while biodiesel is in the tank. Does that make sense or am I on the wrong track?