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When should i change the air filter ?

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The link I posted was Donaldson nonsense. Here's one of their videos. At the 1:33 mark, it explains how new filters can expose the engine to more contaminants:


... and here's some CAT nonsense (see page 24, 4th paragraph down in the left column): http://albahar.com/wp-content/uploads/2014/09/SEBU9208-00.pdf CAT even developed a line of filters around the phenomenon: https://parts.cat.com/wcs-static/pdfs/PEHP6028-04.pdf



... and some Cummins nonsense: https://www.cumminsfiltration.com/html/en/training/faq/air.html



So if they're correct that a filter is least efficient at stopping particulates when it's new, then changing to a new filter more often would expose the engine to more contaminants than just leaving one in for whatever service life they recommend.


Whatever. It's your truck - change it whenever makes you happy.



Edited by txab
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