Hi Collector~ the Frantz ~ is a by pass filter ~ a small amount is drawn off to be filtered ~ leaving the engine OEM filter in place ```
A roll of Bathroom Tissue is contained in the Frantz ~ threw which the oil is pressure fed length wise ~ filtering down to 1- 2 microns ~ the OEM filters allow particles as large as 25 microns ``` The oil in the engine is the color of dark honey ```
The additives in the oil are in solution and are not caught ~ water is trapped so Acid is not formed```
Oil does not wear out ~ it becomes dirty picking up metals ~ soot ~ ash and other thing ~ turning the oil into mud ```
Paper becomes stronger when oil wet~ all the filters in today's motors are paper```
I've used them from the 50's when Frantz use to sell them at the flee market at the Drive ins for 24 dollars installed```
Your oil is always clean all the time and has fewer particles than oil from the refinery ```
We'll change the oil on her car every 3 to 5 thousand miles ~adding about 1 quart for the oil and gunk trapped in the filter ~ replenishing the additives that are mostly detergents ```
We never changed the oil that was in the engine ~ so we could watch it get clean ~ we did change the OEM filter when we installed the Frantz```
In about 200 miles ~ she didn't keep exact count ~ the oil went from ~ about ready for a drain and change to nice looking ~ we caught some in a glass jar ~ rolled it and held it up to look through ~ it's very clean and is now picking up gunk from the oil galleries and lifters ~ every where gunk piles up ~ bringing it to be trapped in the filter```
Engines Can last ~ some people believe ~ engines are made to last a million miles~ I don't know ~ I have one on my 50 Chevy moving van and a few other things ~ oil stays clean ```
Like that great pick up you have ~ plenty room under the hood for one ~ clean oil continually ```