Originally Posted by Toyoland66
A 93% reduction in particulates is, well, as in going from no filtration to having a filter....
My used engine oil is cleaner than the oil which came out of the quart bottle..
There is such a thing as overkill.
The first comment is simply asinine. A 93% reduction in particles of a meaningless size is NOT the same as going from no filtration to having a filter.
Filtering particles much smaller than the gap between bearing surfaces falls under this category... and this filtration may come at the expense of flow/pressure drop and increased load on the oil pump drive mechanism.
40-50 microns? Big concern.
24 microns? Not a huge concern.
14 microns and below? What were his numbers on the new oil out of the bottle?
Modern engine specification MINIMUM clearance is .0005*D where D is the diameter of the journal. Max clearance is .001*D
For a 2.5" journal, that comes out to 32-64 microns.
Anything smaller than 32 microns will remain suspended within the oil and flow out of the bearing, and depending on where your engine falls in the spec, potentially anything as large as 64 microns will never bridge the film.
A human hair is typically between 60 and 90 microns for comparison.
The same applies to oil itself. Synthetic is a good thing, but conventional is "good enough" so long as it is changed regularly. Arguing how "this $10 synthetic oil is so much better than that $5 synthetic oil" is arguing how much MORE overkill is really needed.
Economics balances it out.
The EAO is a good filter... but the OEM is $4, the EAO is over $10, plus shipping. Likewise for the oil. Mobil-1 is good. So is Amsoil Signature.
But unless you are a dealer or "preferred customer", it's not worth it.
The cost to benefit is simply not there.
Amsoil's marketing then moves to improving the economy by going to extended change intervals... and in doing so, much of the benefit of the product gained in the first place is lost.
But Amsoil is good at marketing... almost as good as they are at making quality products. I'm not going to bash their products because they are
good, and I have used them... but their marketing "machine" is a bit out of control. They issue spec sheets that over-emphasize issues, and their self-educated dealers take it and run with it, spreading a lot of misinformation and myth that didn't originate at corporate HQ, but corporate does nothing to dispel the exaggerations and often foolish claims of their dealers.