Mann filter and Bio Diesel.

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John Green
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Mann filter and Bio Diesel.

Post by John Green » Wed 16 May, 2012 5:39 pm

Hello all, we get all sorts of technical updates from our various suppliers and I thought as we have a few Bio Diesel guys on here that I would share this one.

The use of MANN-FILTER products with bio-diesel fuel

MANN+HUMMEL fuel filters have been designed and developed for use with diesel fuels as specified in EN 590:2010-05.

When MANN-FILTER products are used with rape-oil-based FAME (fatty acid methyl ester) fuel according EN 14214:2010-04, hereafter referred to as bio-diesel, appropriate variations, limitations and comments must be taken into account:

Effects of biodiesel

- Bio-diesel has a cleaning effect, releasing deposits collected in the fuel system (for example, in the tank and fuel lines) when conventional diesel fuel has been used. These particles are then retained by the fuel filter, which can quickly become clogged (NB: engine may stop!). For that reason, the fuel filter must be changed before and after filling the tank with bio-diesel for the first time.
- Water dissolves far more readily in bio-diesel, compared with conventional diesel fuel. The fuel filter therefore has reduced or no water separation capacity.
- As micro-organisms (bacteria, fungi) can multiply rapidly in bio-fuels, bio-diesel is more susceptible to microbial infestation than mineral-based diesel. The fuel is heavily contaminated by the growth and activity of the micro-organisms, and this also leads to a reduction in the service interval.
- Thinning of the engine oil may occur, which can remove the lubricating film when the oil is hot, and thus increase wear, which can reduce the service life of the engine. It is essential to adhere to the oil change intervals specified by the vehicle manufacturers when using bio-diesel.

Before converting to bio-diesel, please note the following:

- Bio-diesel has a cleaning effect, releasing deposits collected in the fuel system (for example, in the tank and fuel lines) when conventional diesel fuel has been used. These particles are then retained by the fuel filter, which can quickly become clogged (NB: engine may stop!). For that reason, the fuel filter must be changed before and after filling the tank with bio-diesel for the first time.
- Before converting to bio-diesel, the vehicle manufacturer’s instructions must be observed. In particular, with vehicles with computer-assisted service interval calculation, the fuel type in the on-board computer (the “Telligent” in Mercedes-Benz vehicles) must be changed.
- The use of non-standard bio-diesel is not permissible and can lead to drastically reduced service intervals.
- No factual data or releases are currently available from the vehicle manufacturers regarding
the use of non-standard and/or alternative fuels (e.g. vegetable oils), but here too, drastically
reduced service life can be expected.
- When using bio-diesel, it is advisable to heat the fuel before filtration. Bio-diesel is more
viscous than conventional diesel. At low temperatures, this has an adverse effect on the
service interval/cold-start characteristics.
- The use of bio-diesel for additional items which are linked to the fuel supply (e.g. auxiliary
heaters, cooling units) must be tested separately; in many cases, no approval from the
manufacturer has been issued.

Please note the following when driving:

- You must follow the service intervals specified by the vehicle manufacturer/in the operating
instructions (usually reduced to 25%). If no instructions are available, the service interval
should generally be reduced to 1/3 of the interval for conventional diesel fuel. The specified
maximum service life is 6 months.
- Mixing fuel types is not recommended, and should therefore be avoided.
- Long periods of engine downtime with bio-diesel in the fuel system are not recommended,
and can lead to polymerization of the fuel.
- The use of non-standard bio-diesel is not permissible/leads to drastically reduced service
intervals.
- No factual data or releases are currently available from the vehicle manufacturers regarding
the use of non-standard and/or alternative fuels (e.g. vegetable oils), but here too, drastically
reduced service life can be expected.
- Contaminated/used diesel filters cannot and must not be cleaned, back-flushed or jetted.
- The filtration efficiency specified by the vehicle manufacturer must be met.
- The use of bio-diesel, as outlined above, leads to shorter service intervals (drastically
reduced in some cases). However, no warranty claims arise as a result.

Further information can be found from BP under http://www.bp.com: search for “Biofuels”.
Inaugural OZBENZ national meet this September, all welcome to attend. https://ozbenz.net/viewtopic.php?f=46&t=25165

M.B Spares & Service 14-16 Lyell St, Fyshwick ACT. Ph 02 6239 1099

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yellowsub
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Re: Mann filter and Bio Diesel.

Post by yellowsub » Wed 16 May, 2012 11:11 pm

https://www.mann-hummel.com/en/mann-fil ... el-filter/

From that:
MANN-FILTER fuel filters are also adapted to the high demands of sensitive injection assemblies, as well as the specific properties of alternative fuels, for example biodiesel.

More from Mann and biofuels:

https://www.mann-hummel.com/company/upl ... lZbakn.pdf
--------------------
1987 W124 300D

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