Oil Filters.  Their are cheep ones, expensive ones, factory ones, after market ones.
Which one is, ‘best’ ?    Is it the, ‘used’, one ?

For years, I have always thought, a, ‘used’, oil filter, filters, better, than a new one.
Reason: The, ‘used’, filter, has some, ‘plugging’, of dirt/metal/carbon/etc, which allows only smaller, and smaller, particles to go through.

When it comes to changing oil. (In most of the ICE's I use). I take off the filter, drain it, (take out the used oil), then making sure the ‘O’ ring/seal is ok and threads are clean, put it back. Sometimes 4 or 5 oil changes.  It seems to work well.

(Unless I just picked something up, than change the filter on first oil change, cause I have NO  Idea what the PO did)

But of course their is a diminishing point,  where it is, ’to’ plugged up, and nothing will go through.

Don’t have, or have access to, sophisticated, flow meter, and micron particle measuring equipment.
So the time for a ’new’ filter, is a ’seat of the pants’ thing.

Don’t expect, ANY, filter manufacturing company to do this, (even though they perhaps have), because, if a ’new’, filter was, NOT, required, every, or every other, oil change, it would decrease their revenue.

But, does any one know, of a independent lab that has done this? And if so, the results?

In discussing this at swap meets, and with, ‘gear heads’. It seems, about 1/2 are the every/ever other, oil change. and the other 1/2, 5-7 times.   Even had a extreme of a farmer, who bought a new Massy, in 1955, and was on his, 3rd filter  !!!!!!
He told me: “Son, I Just drop the oil when I come in from the field,  take out the filter. (a steel cased filter in a canister), drop it in a coffee can of kerosene, then after lunch, take out the filter, then after my nap, fill her back up”.
Now that, I think is rather extreme.

So, what are your thoughts on, ’new’ - ‘old’,  Oil filters.

My lawn mower maintenance states change oil every 100 hours, filter every 200.

I didn't always change the filter on the bike. I did dissect a few.I didn't see scary stuff.

The Air filter.  The kind you have on now, is ’tuned’ to the motor.
Change the airflow, one way or the other, you need to change the tuning.
The Air filter, which works for you, now starts getting dirty and dirtier, the engine performance changes,
because, the air filter is getting, ‘blocked’ up, so their is less air getting through. Because the large holes are getting blocked up, so their is only smaller and smaller, 'holes', left.

Why is that not the same with a oil filter.
Except that doesn’t have to filter out the tremendous volume of air, (and particles) through it.
The oil filter is ‘cleaning’ the same oil. No new, ‘particles’, are introduced to it. (well some, but they should be really small , wear/carbon, ones).

So outside of, new, break-in, oil filter change/s.

I am thinking along the lines of the Quote below:

Quote:


So, if bigger particles, are plugging spaces in the filter, would not a, used filter, ‘filter’ out more, and smaller ones, of the ‘wear’ metal particles?

(Of course to the point of restricting the flow)

But it could be a, ‘Match’ in a Bonfire.  Throw a match in a bonfire, it DOES change the temp, but does it matter.

Yep, most probably a:  ‘Match’ in a Bonfire".  

Gonna go to the shed, and look at how to adapt,
Digger's, Excellent, Preventive Medicine, post.
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1416115626

After I get some more wood for the stove.
Because not it's not cold, yet. Only 15f, w/25 +/- wind.
with only 3" of snow. Bikes are nicely, tucked away, for the next 5 +/- months.

Not bad here.  Some places, aground Superior,
already have, 'Lake Effect', snow of up to 2 feet.

I think the oil filter for the Savage has a pop off valve built into it which bypasses the filter element if the screen gets too plugged up with crud.
 I replace my filter every two oil changes which seems to work out. Just got onto the Rotella band wagon for my bike, was using 20-50W auto oil before the change over. Never spotted anything odd in the oil so far, no metal or chunks of RTV so with a little luck I'm looking at many more miles on the scoot.