I've heard a lot of people taking about problems associated with WVO residue, call it polymerized WVO, mainly how to get rid of it.

There's been a lot of claims about what works to desolve WVO residue.

I had a bit of time while at work yesterday to put various substances to the test and see if we can figure out what works and what doesn't. If the info can be used to help anyone keep an old MB on the road it will be worth it.

Objective: test various substances ability to desolve WVO residue.

Method: I took a sample of polymerized WVO from one of our filter housings at the plant and broke it into physically equal size pieces.

I measured out equal amounts of the test substances into a 80ml beaker and put it on the magnetic stirrer.

Testing each substance one at a time I dropped in a piece of the WVO and let it stir for 20 minuets.

I observed the state of the WVO after the 20 min stir and took pictures for us all to use to draw some conclusions.

Substances to be tested:
Acetone
Naphtha
Potasium hydroxide solution ph 13
99% pure methanol
Cascade dishwasher soap with dawn
Lacquer pain thinner
Pure biodiesel
300 degree f clean penut oil

Any ideas which one worked best?

Stay tuned for results

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Current fleet
2006 E320 CDI
1992 300D - 5speed manual swapped

former members
1984 300D "Blues Mobile"

1978 300CD "El Toro"