Originally Posted By: spasm3
Sure, the filter will get the ones bigger than 10 microns. I doubt that in most modern engines you will find large particles.
If the particles are small enough to get through the filtering media, then they're rather harmless, IMO.
Quote:
If someone here posts a uoa with high wear metals do we recommend they leave the oil in? Why would a new car be different?
You're throwing two different issues here into the same basket: metals due to break-in and metals due to an engine problem. The fact that you have metals in your oil does not necessarily mean that they're causing additional wear. There is usually some other thing at play that causes these metals to appear. In case of break-in, it is perfectly normal. Now, if you have a car with 100K miles and you still have high metals, that's a different story. You know your engine is not breaking-in anymore, so you need to figure out what is producing these high metals.
There is no proof that I'm aware of that would show that not dumping the factory fill early will cause premature engine death. But then again, we're all BITOG'ers here... anal about oil. If it makes us sleep better at night, do it.