Originally Posted by humdinger
Originally Posted by ironbender
When the filter is loaded?


Ding ding... when it is super loaded. Ideally it should have a restriction gauge or filter minder telling you its at 25 in h20 restriction.

Most cars dont have them, but I assume military vehicles do. Off road equipment normally does.

I was hoping the military trained guy would tell us how the army does it and how he does it.

Changing air filters too early or too often lets more dust in the engine than running them really really dirty.


I try to change the one on my diesel before the turbo collapses the intake. But sometimes I wait until after.

Is the theory that changing the air filter too often exposes the clean side to accumulated dust in the airbox/housing? Or does a new filter not filter as well as one that is "seasoned"?