True.....very true, guess it might be a wise idea to grab some neo magnets from work and incorporate them into my "pot" that'll take care of the ferrous particles at least.

Another question is these particles are going to have to be smaller than 6 microns to get past the filter. 6 microns = .000236 in. sooo.... not even 1/4th of a thousandth. Is this large enough to worry about?

 

How deep is a scratch on a seat...10 scratches....1000 scratches?
Those filter bags are so inexpensive....100, 10 & 1 micron assortment was <$25 on eBay. The 1/2 micron bag was about $25 on eBay.

 

I don't know for sure, but I'd think any abrasives at all would eventually cause some degree of wear. How much, I don't know. Honestly, when I occasionally run WMO in my diesel VW, I only filter it to 10 micron. My car is old and expendable. If I did it with my truck, I'd want to filter it finer. The magnets are a good idea though.

 

Attach magnets to your filters....cheap and easy.

 

Only works for magnetic (ferrous) metals, what about all the rest???

 

nice info... so far I have ran up to 100% waste oils without filtering.

I've got a full filtration system sitting here, but have not used due to knowing source is clean.

your CTD's filter will filter down to micron level already. now if I didn't know my source. I'd be double filtering

 

Beware that there are two types of filters, nominal and absolute. Absolute filters are rated to remove 99% of their rating 5M, 10M, whatever, in one pass. They are very different from nominal filters. Nominal filters, the ones most people use, have no rating removal percentage. They don't come close to removing 100% of the rating they are designed for in one pass. To get them to really work, you need to do multiple passes, or "polish" the oil. If you use filters and only pass once, go with absolute filters.
I use a X-100 filter housing, absolute 1M filter, and polish the oil for hours using a 100 gal/hr. pump @ 7psi. Is it overkill? Don't know, but once the station is set up, it is easy to filter and how safe can you be? I have not changed my truck filter in a year, still very much in the green.
I have never heard of metal being a problem with WVO. No matter, the filter would take care of it.