Operating a DC-10 eastbound across the Atlantic we experienced a slow but steady oil loss which we calculated would not see us to our destination. So at 30W we shut down the engine with sufficient oil remaining and the intention to relight it for our arrival, all engines being obligatory for the auto-land required under the forecast conditions.
However, to our dismay, we discovered that the oil consumption increased drastically with engine out, precluding a re-start. An improvement in the weather saved any embarrassment and we landed engine out. But interestingly, it was explained to us that under windmilling conditions the GE-CF6 labyrinth seals no longer perform and hence the rapid oil loss.