Patxitxi explained :
Mine leaked from day one. Taking into account the sophisticated motor and
mechanical adjustments of these machines it seems as if the oil delivery was
not thought properly (was it so difficult to provide a way to regulate the
oil flow?) It leaks ALL oil left in the deposit. (so I need to refill
everytime I use it again)

I dare say it has lost many gallons of oil, since this was originally
posted five years ago.