Originally Posted By: Shamus
Originally Posted By: Gary Allan
That's the same test standard that Amsoil uses for the EaO
ISO 4548-12 of 98.7 percent at 15 microns That's Beta15=75
By their email:
25 microns - 100% (beta25= ?)
20 microns - 99.9% (beta20=1000)
15 microns - 99.20% (beta15=125)
10 microns - 92.8% (beta10=14)
5 microns - 51.3% (beta5=2.055)
That looks like a hydraulic filter spec. There you tend to have specific particle sizes ..and subsequent/resultant beta ratios. Automotive filters usually have standard beta ratios and oddball subsequent/resultant particle sizes.
2/20/75/200/1000 are typical beta ratios.
50/95/98.7/99.5/99.9
Interesting.
All I know is I asked them for their stats for their PureONE auto filter and that is what they gave me.
I'm not arguing with you
..I'm just saying that it's not something I usually see with automotive filters. This could surely be how Purolator does things.