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 Perú

What is the beta rating and effeciency of the filter you are using ? Are you speaking about a secondary or by-pass filtration or a full flow filter ?


Rolly ANgeles

P.Prieto . If you are trying to obtain your reading with a laser particle counter then you are just seeing additive interference. Ask someone to do a patch test ( ISO4407 count or correlation ) to confirm this for you.

Hope this helps

Can you use the patch test in used engine oil? with no interferance from the soot content? can you send by email a photomicrograph as example?

Thanks & regards
pcancino

You probably could for very clean used diesel engine oil and certainly could for used gas engine oil. But for you average used diesel engine oil you would probably need to dilute the oil significantly (say 1:100) and conduct an ISO 4407 manual count. Once you have enough sample data you could use your photo's to estimate other samples with reasonable accuracy. P.Prieto was trying to particle count new oil.

Hope this helps