Or add a liter or two of biodiesel! Even a 2% biodiesel blend in ULSD gets you more lubricity that regular sulfured diesel does. Go up to B5 or B10 and you'll be doing even better.

peace,
sam

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"That f***in' biodiesel is makin' me hungry."

1982 300TD Astral Silver w/ 250k (BIO BNZ)
2001 Aprilia SR50 Corsa Red w/ 5.5k (>100 MPG)