I did an air filter change today with all the other regular stuff.

I did make a 3200-mile trip this summer.

I'm averaging about 10k miles a year but probably did double that this year with many trips.

There was a lot of sand and oil. I drive about 10mph on a dirt road at our camp property, but not every day, maybe average every other week, and back and forth across the road a dozen times during the weekend. 40% of the year, it's not dusty during the FL rainy season.

Maybe I'm just not used to the air intake power on diesel and everything it can suck up.

It never looked this bad before, though.

How often do you guys change your filters? I do once a year.

Why would a dark oil residue be on the air filter?

From what I can tell, the air comes up through the wheel well.

I don't see a return hose of any sort going to the filter side of the intake.

Could I really pick up that much oil from the road, or am I missing something that could be going bad or is messed up?



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