Originally Posted By: Cujet
After cutting apart filters for the last 30 years, I've come to the conclusion that they generally don't need to be changed at all.
The flow rate is not restricted by the 2 or 3 microscopic specs of debris that have accumulated during double oil changes, without filter change. Yes, I do look at the element with my Nikon microscope.
While I don't have flow data, oil pressure is my only indication. Since my car shows oil pressure via the aftermarket ECU using high resolution sensors and a digital display. I get 80.4 PSI on startup every day, new oil or not, new filter or not.
Because the oil flow rate is not that high, one would really need a very clogged filter to affect pressure. And, at that point, an engine is not healthy.
Cut apart your last filter and see for yourself.
Originally Posted By: Cujet
After cutting apart filters for the last 30 years, I've come to the conclusion that they generally don't need to be changed at all.
The flow rate is not restricted by the 2 or 3 microscopic specs of debris that have accumulated during double oil changes, without filter change. Yes, I do look at the element with my Nikon microscope.
While I don't have flow data, oil pressure is my only indication. Since my car shows oil pressure via the aftermarket ECU using high resolution sensors and a digital display. I get 80.4 PSI on startup every day, new oil or not, new filter or not.
Because the oil flow rate is not that high, one would really need a very clogged filter to affect pressure. And, at that point, an engine is not healthy.
Cut apart your last filter and see for yourself.
I've been saying this about filters for years now here at bitog except I don't have microscope observations to prove my assertions.
On a clean engine there is hardly any particulate and it needs to agglomerate to be large enough to filter out. As filter pores trap particulate they effectively become more efficient which means those particles that once passed through the media are now able to be trapped,which in a real sense can reduce the wear associated with insols.
In 20000 mile intervals using tough guards on my engines I have yet to see one upon dissection that has been clogged to the point it creates a restriction which causes a by-pass event.
Now I'm only talking about engines that are known clean with no deposits bout up that may dissolve and excessively load up the media.
My experience and opinion is based on filter dissection.
It's why I laugh at those guys who pay extra for long life filters and long life oil and run rediculously short intervals. Exactly what have they convinced the,selves there is to gain. Paying more money for what. Some perceived sense of improvement. It's nonsense.
And when its explained to them they ignore the obvious and dig in their heels. If not here to learn about these topics and apply that knowledge why even be here.
I don't get it. If they already knew it all why bother
