actually, the quieter running has to do with the difference in ignition and flame rates in the combustion chamber, not the lubricity (which would only affect the Injection Pump and Injectors).

cheers!
e

'85 300D
211K miles (95K+ on B99+)


On 22/Jan/13 17:40, Curt Raymond wrote:
Last year I ran about 1/2 tank B5 in my 240D and got a noticible reduction in 
sound which I attribute to the increased lubricity of bio.

-Curt

Date: Tue, 22 Jan 2013 13:49:28 -0500 (EST)
From: rdeaf...@aol.com
To: mercedes@okiebenz.com
Subject: [MBZ] Subject: Re:  Sulphur Additive ?
Message-ID: <1e79e.13bea5f9.3e303...@aol.com>
Content-Type: text/plain; charset="US-ASCII"

Snake oil, no need for it. You'd be better off adding some bio-diesel to
improve fuel lubricity, which may have suffered when the sulfur was  removed.

Sulfur won't help at all, may do harm; increase the amount of  acids your
oil needs to deal with.

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