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Old 03-04-2005, 09:32 PM
'81 300TD
Join Date: Aug 2004
Location: Oregon
Posts: 38
Biodiesel - Fuel Line Replacement

Does anyone know if the OEM fuel lines and injector lines, for an '81 300TD, at the Mercedes dealer are biodiesel compatible (i.e. synthetic, Vitron, etc.) ?

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Old 03-04-2005, 09:56 PM
Jimmy Joe's Avatar
peace out
Join Date: May 2004
Location: California central coast
Posts: 1,004
the story is, if you get new lines, they are compatible.
that said, I wonder how one knows for sure the ones you get are recent enough....
I just picked some up, I will let you know...
Think Alternative Energy!
300CD '80 (now gone but not forgotten...)
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Old 03-04-2005, 10:16 PM
phidauex's Avatar
BioDiesel Hopeful
Join Date: Oct 2004
Location: St. Louis, MO
Posts: 806
What exactly is the I/D of our injector return lines?

Dayco is selling a new flouroelastomer with a braided reinforcement that is specifically rated for high pressure injection systems and biodiesel (it even mentions it in the specs). Sounds like good stuff, and is supposedly very well priced.


P.S. The way you can tell if your lines are recent enough is by watching them to see if they start to weep.
"That f***in' biodiesel is makin' me hungry."

1982 300TD Astral Silver w/ 250k (BIO BNZ)
2001 Aprilia SR50 Corsa Red w/ 5.5k (>100 MPG)

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Old 03-05-2005, 12:09 AM
Registered User
Join Date: Sep 2003
Location: Back in Colorado for now
Posts: 1,315
I tested a sample of the latest MB fuel line in a jar of comc'l BD for 6 months. No elongation, expansion or degradation (I at least expected SOME expansion, seems like that would happen with immersion in about ANYTHING for 6 months?)

Just thought about it, I think I'll throw a sample in some homebrew WVO BD for 3-6 months and see what comes.
1984 300D Turbo - 4-speed manual conversion, mid-level resto

1983 300D - parts car

1979 300TD Auto - Parts car.

1985 300D Auto - Wrecked/Parts.


"If you don't know where you are going, any road will get you there". Lewis Carrol
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