they all tend to go around 40 - 70 k mark if they do go
i hear about them going around 90 - 100k but i reckon it is more down to the owners not looking after em
the same as a cam belt really, u dont replace it on a vxhall after 40000 miles and your looking for trouble
i know people who buy brand new cars and cant even afford to service em then they seize up a few years later due to lack of oil then blame the dealerships