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Reply to "Air Filter"

This applies to Motorcraft filters also. How did you think K&N got the Higher flow numbers? A friend who has his oil tested everytime it is changed put a K&N on his F-350 Diesel. He changes oil every 5,000 miles. After the change to K&N and 5,000 miles the oil analysis showed a high Silica count. Just under where the alarm bells go off.
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