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If it's leaking oil from those lines, you may want to get it fixed soon. When the o-rings on those hoses let go, you'll dump gallons of oil in a matter of minutes, and it will leave you stranded on the side of the road.
As Pocket said, don't put off this leak. It's not just a nagging little leak. You can get the o-rings and the special loc-tite for the fittings here:Replacement O-rings for Diesel Engines