russ92xmsed wrote:Jim, when you say grossly overfilled, how overfilled?
5mm over is not a problem Russ, I'm talking two or three litres over at least..
The case I was speaking of was caused by a duff oil level sensor and the owner kept on topping up and up and up trying to make it go out. It did eventually but not for the reasons he hoped
Another cause of a race can be diesel leaking into the sump and raising the oil level. If you see the level magically going up that's not the magical XM self-fixing going on but a real problem. It's virtually unknown on the XUD but used to be a problem in engines that had mechanical lift pumps - like old-school petrol pumps - driven from the engine cam and slapped on the side of the crankcase. Engines with jerk pumps could also suffer but invariably these were industrial engines and not automotive ones...
Back along, the Lister H series, used to drive - amongst other things - generating sets, used to suffer quite badly and it was essential to check the oil very regularly because of this.
Broken piston rings can cause diesel to leak into the sump but again you'd know there was a problem anyway with other symptoms and in DI engines it can be caused by dribby injectors - I believe there's several well-known examples of car engines (not PSA) that suffer badly from this and cause them to self-destruct in the end when things get bad enough...
All I did was flesh it out a bit..
I got in 5 litres and then slowly kept adding more little by little till it was fine. I know...totally unessessary, but it worked for me!