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In page Ultra-low-sulfur diesel:

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ULSD runs in any engine designed for the ASTM D975 diesel fuel, however, it is known to cause some seals to shrink,[3] and may cause fuel pump failures in Volkswagen TDI engines used in 2006 to pre-2009 models.[citation needed] TDI engines from 2009 and on are designed to use ULSD exclusively; biodiesel blends are reported to prevent that failure.[4][5]