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Wendell Voto wrote:
> I used and still have one of thoes tissue paper filters. It worked
great.
> Only reason for not using it now is there is no room in modern car
> engine compartments to mount this by-pass filter. Did not change oil
> in car I used it on, just changed filter and added the quart lost when
> changing paper.
> My impression of oil filters is that they will only hold the "big
> stuff" that might block passages but do little to really help keep oil
> clean, hence change oil to get dirt out. FWIW
> Wendell
The experts from the oil companies that I listened to at SunNFun,
indicated that a big part of the oils job was to buffer acids. The
acids are caused by water reacting with byproducts of the combustion
events. Sulfuric compounds mostly. There's always some acid, but a
regularly used engine will have less (the water is constantly being
boiled off). Tiny particles, too small for the filter to catch, can be
held in suspension and never cause an appreciable amount of corrosion,
IF the oil is changed when it's ability to buffer the acids has been
used up. The counter-intuitive part was that a weekender engine uses up
the buffers FASTER than a busy trainer, as the weekenders and hanger
queens don't run enough to constantly boil the water off. The
disturbing part is that the oil can be as clear as sulfuric acid, and be
doing your engine a world of hurt.
Of course, this comes straight from the mouth of the horse that's trying
to sell you some oil 8*)
The advocates of the tissue paper filter claimed that the moisture was
removed along with acid producing particles thereby reducing acid damage.
All I know is, the car I had it on was still running like almost new when I
got rid of it; back when 125K miles was real high mileage.
I am temped to put it on the rotary engine but don't want the extra weight
but wouldn't be any heavier than the remote filters.
Wendell (I'd still change oil once in a while)
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