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This does not apply to all the triples...only up to the first couple of years of the 955i. Since a revision in 2002 (if I recall the date correctly) they are much less likely to inhale oil during a left-hand-side spill.
If you're not familiar with the "hydrolock" term, Urb, it means that liquid (oil, in this case) gets into the combustion chamber. Since liquids don't compress like the normal fuel/air mixture does, there are incredible pressure pulses in the affected cylinder on the compression stroke. That can damage the connecting rod, causing it to break while going down the road anywhere from a couple hundred to a couple thousand miles later. This, in turn, can cause your engine to break apart and blow hot oil all over your leg and rear tire, which is something you especially don't want when the engine itself slams to a halt and locks up the rear wheel.
There were very dramatic pictures of an engine to which this happened in the Tiger forum a few years back.
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John
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