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Dirt and wear contaminants your oil filter cannot capture are damaging your engine and costing you unnecessary oil changes.

Dirty Secrets - Where do Abrasive Wear Particles Come From?


1. The refining process does not filter engine oil to below 10 microns.

2. Up to 18% of the old oil remains in the engine during an oil change.*  Particles suspended in the oil stick to the surfaces of your engine. 

3. Particles less than 10 microns generate about 3.5 times more engine wear than particles greater than 10 microns in size** .

4. Washing fluids used to clean new engine components in the manufacturing process are not filtered to sub 10 micron levels.  This leaves abrasive residue.  Additional residue is generated during the engine "break in"period.

5. Contaminants such as silica enter the engine through the engine air filtration system. Gasoline and diesel also bring wear particles from the refinery, pipelines , trucks and storage tanks.  Diesel deposits soot in the engine.

6.  Even premium oil filters do not capture particles below 20 microns in size.

7.  Two percent of the weight of oil circulated is dirt particulate*.  This means that over 2 tons of abrasive solids circulate through an average car engine running 12,000 miles (19,440 km) per year!

How Bear Trap Magnetic Filters Work

How Bear Trap Magnetic Filters Work

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* Tribology International, 1991, pg. 329;

** SAE paper No. 650865 by Pfeifer & Finnigan



Lube Analysis.JPG

Oil Analysis - 2002 Kenworth - CAT 3406  475hp Engine with 1.054 million miles (1.7 million km).

Randy O'Linyk, of Calgary, AB uses magnetic  filters on his engine oil, coolant and fuel.  Over a 12 year period he extended his oil change interval from the recommended 300 hours to 700 hours.  Using an average speed of 40 mph, the 12,000 mile oil change interval was stretched to 28,000 miles. (over 45,000 km).  The  engine oil analysis on the right shows the oil condition is excellent, even at 744 hours, or an estimated 29,760 miles.   

Photo micrograph submicron.JPG

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Sub micron wear particles captured 

by the Bear Trap™.

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