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Problems with ISO Code and New Engine Oil SAE 15W40

Actually I have many problems with Engine Oil, because I cant obtain ISO CODE, I try with filters of 2mic and synthethic media, flow <=4gpm and working for 8 hours I think that maybe the count particle test work with additive particles chains too and thats my problerm. But how can I eliminate this additive particles before this count particle test?

I use new engine cat oil SAE 15W40 and I start to filtrate with ISO 21/15 and after 8 hours I only obtain 19/11

Thank you

PRIETO MATZUKI PERCY
Ferreyros S.A.A Lima PerĂº
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