|
Zeke, as I understand it
Oil contains contaminants which are blowby products of combustion. Thus oil contains, in more simple terms, dirt, unburnt gas, and water vapor that condenses down into the oil.
The inner seal on the bearing eventually allows the oil in the crankcase to penetrate into the area of the bearing and the hot oil eventually drives out the grease that was originally put there by Porsche to lubricate the bearing.
The more contaminated the oil that penetrates the seal, the less effective job it does of lubricating the bearings and the bearings wear faster eventually reaching a point where they wobble and even disintegrate.
Thus the better the oil, the more frequent the oil changes, the longer the trips (to better "cook off" the water valor in the crankcase... the better able the oil is to provide lubrication when the oil gets to the bearing.
|