Quote:
Originally posted by Craig
In ULSD further hydroprocessing removes sulfur and significant amounts of polar and aromatic compounds that give conventional diesel fuel adequate lubricating capability. Low lubricity in diesel fuel can cause engine problems unless treated with additives.
The joint statement notes that their standard for lubricity of fuel is 460 microns (HFRR). The US maximum standard is 520 microns of lubricity for ULSD. Thus there is a possibility that the US ULSD would not be within the range recommended by the manufacturers. The paper notes that the use of additives without known negative side effects are recommended to meet these lubricity requirements but that any problems with the engine caused by the use of an additive is the responsibility of the additive
manufacturer (Would this be an easy issue to prove?). They go onto say: “Refer to the vehicle manufacturers Limitation of Use
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For clarification: "the 460 /520 microns of lubricity" actually refer to the size/depth of the scar measured during the HFRR test. A lower scar diameter is preferable as it indicates the fuels' ability to reduce metal to metal contact.
01-10-2010, 09:53 PM
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