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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I have 106k on my '07 duramax, and i've changed the filter 3 times. I watch the gauge, and seems like right around 30-35k it's time to replace it. They don't cost much, and are cheap insurance for your engine!
