Newbie to MB

[greendream]

Hi,
I need to introduce myself. I just bought my first diesel on ebay. Its a 1979 MB 300SD with a greasecar WVO system installed. Very strong runner and smooth shifting transmission. It is leaking alot of oil however and I'm wondering if there is any danger of a worn seal giving out somewhere and draining the crankcase on a longer trip? I would like to be able to drive this car 8 hours or so on vacation soon. Can I just keep adding oil till I can get these seals replaced or should I be concerned about this? The car is in pretty decent shape for its age. I plan a gradual restoration.

I'm a college instructor and do-it-yourselfer with a strong interest in older cars. I do alot of my own work and maintenance already on a 240 volvo and a 1982 Toyota Landcruiser.

Thanks in advance.