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      01-08-2013, 08:44 PM   #21
Julesandtrish
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Drives: 335d
Join Date: Jan 2010
Location: North Carolina

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2010 BMW 335D  [5.00]
Quote:
Originally Posted by cssnms View Post
There are some differences in order to account for ULSD. However, those changes do not protect fuel pumps and the like from poor quality/low lubricity fuel.

"The Engine Manufacturers Association had requested a standard of a wear scar no greater than 460 microns, typical of the pre-ULSD fuels. Most experts agree that a 520 micron standard is adequate, but also that the lower the wear scar the better."

Hence why I prefer to add an additive.
Amen brotha!
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