Monster5601
Platinum Member
"Sulfur is not a lubricant in of itself, but it can combine with the nickel content in many metal alloys to form a low melting point eutectic alloy that can increase lubricity."
and
"The processing required to reduce sulfur to 15 ppm also removes naturally-occurring lubricity agents in diesel fuel."
Source:
Ultra-low-sulfur diesel - Wikipedia, the free encyclopedia
Very interesting read. Also, several posts quoted the above in various degrees but forgot to mention one of the source.
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