It won’t work for you “certified” aircraft guys, but in an experimental there is a lot to be said for the “toilet paper” side stream filters… just saying. ( I still regularly driving a 1947 Chevy two door sedan that had one installed back in the 1950’s or so, I’ve owned it for close to 30 years with zero major work knock on wood) and the oil still stays amber.
The reference is likely to a “ Frantz” oil filter. As a former dealer I can
assure you they tend to be misunderstood. Some points:
1. They do NOT take the place of the existing “ Full Flow”
or screens. The unit is a “ Bypass “ filter that is plumbed in
parallel with the existing Full Flow. Best to think of it as an
Engine Cleaner.
2. Any bypass filter takes a small amount ( 2 quarts /min) and passes
it through a rather dense media to remove solid contaminates and
water. Since a Full Flow filter has to handle 40-50 qts/min it cannot
be as dense as a Bypass Flow.
3. While difficult to sell someone on installing a Bypass Filter it
would be IMPOSSIBLE to get a trucker to remove the LubeRefiner
or other bypass filter that is OEM.
4. There are many types of filtering media revealed when a bypass filter
is cut open. One brand used shredded newspaper ( including the funnies).
If you visualize oil passing lengthwise through 4 1/2 inches of the
“ Toilet Paper” element I’m sure most folks will understand the filtering
capability.
5. It is absolutely essential that current production TP not be used
in a bypass filter. All (?) are biodegradable which would restrict or
stop oil flow through the filter only. Use only factory provided elements unless you have a stash from the ‘50’s.
6. The aircraft version was known as the “ AeroFrantz” and was STC’d for
most aircraft. I installed several of these and no one ever wanted it
removed. The folks operating Bell 47’s really liked the unit.