Can I trust that little gauge?????
Our 07 Dodge - 5.9 Cummins - has a gauge like this on the air filter The owner's manual says to depend on this gauge to tell you when to change the filter. In fact, on page 391 it says never...
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It's time to check it. Mice can and do chew into air filters. You would never get a reading on the gage if the media were compromised.
