Well it looks like the 6. 4's are similar to the 6. 0's they leak oil
http://forums. thedieselstop.com/ubbthreads/showflat.php?Cat=0&Number=3237142&an=0&page=0#Post3237142
http://forums. thedieselstop.com/ubbthreads/showflat.php?Cat=0&Number=3237142&an=0&page=0#Post3237142
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