I have an 08 F350SD, I had the check air filter warning light come on and crummy mileage like 5 mpg. When I checked the air filter it was a block of ice covered with snow. I ended up replacing the filter, Ford would not warentee the filter at 10000 km, its good to 30000 miles. Now they say they will have a winter front out to me by the end of January as there on Backorder right now. Hmm I guess I have to buy a few more air filters. Now I am waiting for Ford to reimburse me on my air filters I bought. Once they get wet there toast.
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