Originally Posted By: stchman
Originally Posted By: ZeeOSix
Originally Posted By: stchman
Originally Posted By: ZeeOSix
Oil filter magnets work ... and much of what they catch is too small to be caught in normal filters used on cars on the road.
And the particles that are too small for the filter to catch (20-25 microns) are essentially harmless to the engine.
Not really ...
http://www.amsoil.com/techservicesbullet...gine%20wear.pdf
"Small particles are particles measuring between
5 and 25 microns. Small particles are of greatest concern
because they can penetrate the clearances between
wear-sensitive components and promote accelerated
wear. And, because they are so small, they
are difficult to remove from the oil stream."
More reading to choose from:
https://www.google.com/#q=engine+wear+vs+particle+size
Amsoil appears to want to sell everyone one of their fancy bypass filter systems as even their ultra super duper Eao filters don't filter anything smaller than 20 microns (or so they claim).
Since I use AC Delco oil filters (they are probably at best 25 microns), then my engine is going to wear out here in the next 6 months.
The Schaeffer folks had the Ranken folks tear down a million mile Ford 5.4L engine. There was not too much wear on the engine from what they reported.
There are many reports of people getting 500K miles with regular dino oil changes. SO yes, I maintain that microns smaller than what the oil filter catches are essentially harmless. An engine that gets regular oil and filter changes will usually outlast the body of the vehicle.
I hear ya ... just passin' on the study data ... take it up with Amsoil.
Other studies basically also say particles under 25 microns are the most harmful.