Quote:
Originally Posted by Artan
(SNIP)This theory i dont really believe it. They say so but as soon as you turn the car on the oil will be heated up, small amount of water perticles will be removed (evaporate). Although water does not mix with oil but even if it stays in the oil that is a very small amount of it. That is almost zero. If huge amount of water or coolant will mix with oil then you have a serious problems and need to replace teh oil with new one. Oil does not allow metal to condense water. The walls of engine are sealed by oil so even if water particles mix with oil that will not present a danger for the oil.
|
That's another oversimplification and not true.
You will get condensation on the internal parts of the engine that will get mixed into the oil (ever seen milky tan-colored oil?). That moister will sit there until the oil (not the coolant) reaches a temp high enough to evaporate it - it takes a while. Just because the car's (water) temp gauge shows operating temp doesn't mean the oil is up to that temp. Reaching an oil temp high enough to evaporate the moisture takes much longer than bringing the water up to the same temp.
On cold start-up you will also have a rich mixture that can't burn completely. Unburned fuel and acids from incomplete combustion find their way into the oil.
Jay