The Ford Barn - View Single Post

ford38v8 · 10-28-2018, 11:17 PM

[QUOTE=51 MERC-CT;1690436]Those are the normally installed replacement filters. Don't know what the micron rating is but have heard from 10 to 25 micron.
I am running an Amsoil by-pass filter rated in the 2-3 micron range, same rating as the ones used on the diesels.
In a measured test at idle speed the filter passed 5 Qts. of oil in 11 minutes.

so, at cruising speed, about 4+ times the volume? That sounds roughly equivalent to 20+ qts filtered to attain the 95% in 10 miles of cruising. This is sounding so good, I wonder what advantage there could be to use 100% filtered on modern cars?

10-28-2018, 11:17 PM	#33
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 6,645	Re: Oil filters on flatheads [QUOTE=51 MERC-CT;1690436]Those are the normally installed replacement filters. Don't know what the micron rating is but have heard from 10 to 25 micron. I am running an Amsoil by-pass filter rated in the 2-3 micron range, same rating as the ones used on the diesels. In a measured test at idle speed the filter passed 5 Qts. of oil in 11 minutes. so, at cruising speed, about 4+ times the volume? That sounds roughly equivalent to 20+ qts filtered to attain the 95% in 10 miles of cruising. This is sounding so good, I wonder what advantage there could be to use 100% filtered on modern cars? __________________ Alan