F-350 engine air filter

FishOnOne wrote:

agesilaus wrote:
I've been watching that test button on the air filter and checking it by pushing it but it always shows green. I finally decided that it can't be right at 70K and ordered a new one. When I got the old one out it was absolutely caked with dirt, no surprise.

Once or twice a year from now one, I'll visually check it at each oil change. It's supposed to affect fuel mileage so I'll see what happens now.

But just a warning not to trust that check button. It seems to me that my old 'burb had one too, but it actually worked so this is probably not a Ford only issue. Maybe I just have a bad button assembly.

You'd be surprised how much contaminants a filter can hold and still provide proper air volume to the engine.

For my truck I don't even look at the filter gauge and change the filter once/year since they're fairly inexpensive.