hi
 
	it all down to diesel in the oil from either leaky injectors or blocked dpf
 
	so change the oil regular and keep an eye on oil level, if it goes up between checks you have issues
 
	diesel dilutes the oil, its not a very good lubricant and you get heat generated by the main bearing, centre one fails first, cranks gets that hot it weakens and snaps, worse case senario, but its quite common
 
	so keep an eye on your oil
 
	cheers
 
	Joe