One thing I found on my many Fords (23 in almost 50 years) is that if I periodically pulled the filter and cleaned the filter box (wipe/vacuum it out) the air filters would tend to last a little longer and they didn't look as nasty when it was changing time. The Class C and Class A motor home filters were always the hardest to do this with but I would work through the hassles.
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Dave
US Army (Ret)
2020 Entegra Accolade 37TS
2019 Jeep Grand Cherokee Trailhawk (Toad)
FMCA - F432054
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