Drivbiwire
Zehntes Jahr der Veteran
- Joined
- Oct 13, 1998
- Location
- Boise, Idaho
- TDI
- 2013 Passat TDI, Newmar Ventana 8.3L ISC 3945, 2016 E250 BT, 2000 Jetta TDI
Folks need to knock this off.
Its not a joke, Biodiesel especially the types sold in the US (SME - Soy Methyl Ester) are NOT compatible with Common rail and Pump Duse engines.
Why?
Oxidation stability is the biggest factor. Normal diesel fuel being a "Distillate" is refined so that all fractions that re-condense during fractioning are temperature stable, but when exposed to high temperatures under pressure will not break-down and leave deposits.
Biodiesel de-composes into acids, sodium, soaps and other caustic residues that begin to etch the internals of the injectors and this cannot be repaired.
The residues clog the EDM precision passages and eventually the triggering of the injector and its precise control are ruined.
B6-B20 should be used ONLY if thats your only option.
If straight ULSD is your only option your fuel system will be fine provided you use a fuel additive to control water thats in suspension in the fuel. Again, due to the super-heating of the fuel water can condense and form free water, and this can be catastrophic to your entire fuel system. Additives we have found to me the most effective are White Bottle Power Service (Please google search, this will answer where and how much to add or just read the bottle).
Mercedes put out a great brochure on the failures of Biodiesel in modern common rail engines.
Also PLEASE NOTE U.S. BIODIESEL IS DIFFERENT THAN EUROPEAN Biodiesel. European fuels are "RME" with much higher oxidation stability thresholds than US fuels, and even those are limited to 4-6% by volume.
See attached PDF for more information, and PLEASE stop destroying your engine by running B100 in your PD or CR TDI...
https://www.mbusa.com/vcm/MB/DigitalAssets/pdfmb/serviceandparts/biodiesel_Brochure5.pdf
Its not a joke, Biodiesel especially the types sold in the US (SME - Soy Methyl Ester) are NOT compatible with Common rail and Pump Duse engines.
Why?
Oxidation stability is the biggest factor. Normal diesel fuel being a "Distillate" is refined so that all fractions that re-condense during fractioning are temperature stable, but when exposed to high temperatures under pressure will not break-down and leave deposits.
Biodiesel de-composes into acids, sodium, soaps and other caustic residues that begin to etch the internals of the injectors and this cannot be repaired.
The residues clog the EDM precision passages and eventually the triggering of the injector and its precise control are ruined.
B6-B20 should be used ONLY if thats your only option.
If straight ULSD is your only option your fuel system will be fine provided you use a fuel additive to control water thats in suspension in the fuel. Again, due to the super-heating of the fuel water can condense and form free water, and this can be catastrophic to your entire fuel system. Additives we have found to me the most effective are White Bottle Power Service (Please google search, this will answer where and how much to add or just read the bottle).
Mercedes put out a great brochure on the failures of Biodiesel in modern common rail engines.
Also PLEASE NOTE U.S. BIODIESEL IS DIFFERENT THAN EUROPEAN Biodiesel. European fuels are "RME" with much higher oxidation stability thresholds than US fuels, and even those are limited to 4-6% by volume.
See attached PDF for more information, and PLEASE stop destroying your engine by running B100 in your PD or CR TDI...
https://www.mbusa.com/vcm/MB/DigitalAssets/pdfmb/serviceandparts/biodiesel_Brochure5.pdf
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