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Car Forum / Mercedes-Benz Cars / November 2006

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Algae in diesel

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chrismhaney - 03 Nov 2006 23:14 GMT
Any one know what potion to add to the fuel to get rid of this stuff? I'm
changing the primary filter every few weeks.

Chris
T.G. Lambach - 04 Nov 2006 01:16 GMT
Algae is introduced by water and can grow in diesel fuel.

Drain and clean the tank if the problem is bad.

If the car is prior to the common rail injection systems - say, pre '90
I'd add a couple of gallons of REGULAR (low octane) gasoline to about
1/2 tank of diesel. Yes gas. The motor will be somewhat depowered and
clatter more than normal but the gas will kill the algae.

Alternatively, Biocides are sold for commercial use by various companies
- do a Google on Biocides and you'll have those brands. Not cheap.

Either way, you're going to get some (more) practice changing filters.
me - 04 Nov 2006 01:22 GMT
> Algae is introduced by water and can grow in diesel fuel.
>
[quoted text clipped - 12 lines]
> Either way, you're going to get some (more) practice changing
> filters.

I would read a second opinion about adding gas to a diesel, then make
an informed choice:

http://www.turbodieselregister.com/mixing_gasoline_and_diesel.htm
T.G. Lambach - 04 Nov 2006 08:24 GMT
This fellow didn't read my 1980 300SD Owner's manual which allows
regular gas when the alternative is to push!
me - 04 Nov 2006 16:02 GMT
> This fellow didn't read my 1980 300SD Owner's manual which allows
> regular gas when the alternative is to push!

I personally do not know. The only experience I have is as a volunteer
fireman when someone put gasoline in diesel tractor and it blew up.
That however was 100% gasoline :(
T.G. Lambach - 04 Nov 2006 19:40 GMT
That will do it!
Richard Sexton - 06 Nov 2006 17:23 GMT
>> This fellow didn't read my 1980 300SD Owner's manual which allows
>> regular gas when the alternative is to push!
>
>I personally do not know. The only experience I have is as a volunteer
>fireman when someone put gasoline in diesel tractor and it blew up.
>That however was 100% gasoline :(

All diesel engines are not the same. Some you can use ether as a quick
start but you CAN NOT do this on a Mercedes diesel. But, Mercedes has
said for years their engine can run on up to half gasoline in winter
if need be, long term.

I'm guessing the tractor manual suggested avoiding gasoline.

Signature

  Need Mercedes parts?   http://parts.mbz.org
Richard Sexton       | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net

Alec - 04 Nov 2006 08:05 GMT
This is a common problem on boats. Any marine chandler will supply you with
a potion.

The best ones kill and break up the Algae so the residue passes through the
system they also cause water to be absorbed into the Diesel so that the
algae cannot grow in the first place.  I use "Fuel Set", search the net for
it,. there is a web site.

Do not leave your tank low or empty as condensation will form and you will
get water in the fuel.

Alec

> Any one know what potion to add to the fuel to get rid of this stuff? I'm
> changing the primary filter every few weeks.
>
> Chris
 
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