Air filter minder was getting down to the last open yellow line, but I recall that when I replaced the air filter 3 years ago I reset the minder and it almost immediately when back toward that area. The filters I get from Freightliner are Racor. I haven't cut it open, and probably won't, but it does feel heavy and dust flies when I bounce it on the concrete shop floor. I travel from PA to WY and back each summer and PA to FL and back each winter. I don't drive on any dirt roads by choice, maybe some dirt driveways, but very limited, have been forced to use a few dirt construction zones in WY, but again very limited. Who knows where that much dirt came from, but it works now. I do need to reset that filter minder and see what it does this time.
