UintaBound1
New member
Static filters can filter down to 2 microns but they WILL clog fast because they are made from static/stiff material. This is probably how these companies make more money because you'd have to buy a new filter to do the job right. I helped install a PROGRESSIVE filter on my buddy's 4.0L 4runner and this one only needs to be changed every 15K miles or 1 year. The filter progressively filters down from 10 to 3 and finally down to 1 micron. Due to the progressive filtering system it will not clog. I'm going to post an installation of the same filter on my 4.7L v8 4runner. Stay tunedI am thinking a lot about oil filters lately based on Frenchie's horror story: http://www.toyota-4runner.org/4th-gen-t4rs/66618-blew-my-03-v6-engine-then-i-found.html
If I understand the problem the Amsoil EAO57 didn't bypass 'easily enough' (or too easily). The partially clogged filter actually 'stopped/reduced' oil flow enough to cause engine failure. Apparently there wasn't enough oil flow/pressure to just 'bypass' the filter and save the engine from catastrophic failure. That surprises me sort-of. Super thin oil and low oil pressures contribute to better mpg so it's where we are, maybe it doesn't surprise me... (Back when I was a boy 40psi was an ok idle pressure and 60-70psi running pressure when above 1300-1500rpm was desirable. 10w-40 in the winter and straight 40 or 20w-50 in the summer.)
So.... Obviously a good filter and 3-6k oil changes would avoid all the issues. Let's assume we wanted more or to learn more
The way I understand it:
1) Once a filter senses too much pressure differential it should bypass. In theory, if nothing is terribly abrasive, you should be able to drive 1000miles or whatever. Obviously the oil will get dirty fast as it's unfiltered. True?
2) The Toyota filters are "medium bypass" referring to the bypass pressure. If thin oil and marginal pressure are the modern 'norm' why not low pressure bypass other than the trend for small filters with too little media?
Based on what I've said above why not screw on this bad-boy (which does fit a 4th gen V6)?
It seems to me that a Napa Gold, PureOne, Baldwin or any other "good" filter is more than up to an extended interval and if it did clog it would bypass rather than destroy the engine (due to low-pressure bypass)
Thoughts? Comments?
