For those of you using extended oil drain intervals on synthetics, or never changing the oil, what is your thinking on soot?
I've read several places that the micron size of soot is far less than the 2 micron or so filtering that bypass systems are good for... hence the reason for the blackness of the oil even with great filtration. I've also read that this soot is abrasive to the engine and will cause accelerated wear. I see in some signatures above that truck(s) with extended intervals are running a Smarty... so I assume soot loading of the oil is something to be considered.
Thoughts?
--Eric
Or fuel dilution or condensation (water)? Filters cannot get that out. No thanks, I will use Rotella T 15W40 as I have always done and change it every 5000 miles, like I have always done.