Does anybody have experience in running Mercedes CDI engines
(specifically E320 straight six CDI) on biodiesel? I am considering
using initially a small proportion (5%) of biodiesel and gradually
increasing as the crud accumulated from mineral diesel is disolved, and
prehaps replacing the fuel filter after the first couple of tanks.
Presumably this fuel will not have the damaging effect on the fuel pump
that even a small amount of gasoline is reputed to have.
Thanks for the url: I had not come across it. What I am really after is
any first hand experience of using biodiesel in the Mercedes CDI
engines. The materials used for hoses, gaskets, seals, elastomers,
glues, and plastics that come in contact with the fuel will determine
suitability. More importantly I am anxious about the expensive
components, namely fuel pump and injectors.
You are wise in being cautious, a UK CDI owner experienced an expensive
repair when someone mistakenly added gasoline to his car's fuel.
On the other hand, commercial vehicles' contemporary diesels seem to run
well on Biodiesel.
But I too would like some first hand experience before proceeding.
Given the worry involved about the stuff's possibly deleterious
effects on engine components as well as the additional expense
of the fuel itself, it's never been clear to me why anybody would
want to bother with this hippie juice.
"It's, like, really organic, man!"
"It's a real conflict for me when I go to a concert and
find out somebody in the audience is a Republican or
I would second that. There does seem to be a high failure rate. High
pressure common-rail pumps also have a generally higher than acceptable
failure rate when installed in all Marques. My experience of failure is with
the four cylinder CDi and Nissan vehicles but I doubt if these are different
A local outlet normally sells B100 (I know it is unusual) but at the
moment, due to cold weather, it is selling B70.
What I really would like to hear of is any first hand experience of
using any dilution of biodiesel in a CDI engine.
=========I don't know specifically about a CDI, but the GM Duramax 6.6 liter
turbodiesel engine has a Bosch CDI type injection system. GM
recommends no more than 5% biodiesel, but I know there are people with
these engines running up to 20%.
I think that the concern about high concentrations is that there is no
real uniformity to biodiesel right now, and nobody is quite sure what
some formulations in some concentrations may do to hoses, seals and
the like. So most of the recommendations now are conservative.
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