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Reply to "Amsoil EAO vs PureONE"

Yes filters do go into by-pass - another argument against overly viscous oils. Some folks on BITOG years back thought of OF's as failed parts sieves. Only there to catch junk - after the failure. There is some logic in this camp.

As for P1 - people seem to defend this OF as strongly as some other top brands. This one looks marginal:

P1 pics
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