Upon routine inspection of the engine compartment after a trip I noticed that my Informer was showing a RED indication. It was only 1/4 of the indication area, but I guess it may be time to change the filter. I tried to google the Informer on the web to get a PDF file as to the operation of the device, but no luck. I have the 8V92 engine with the Donaldson air cleaner system. If any of you POG’ers have a downloadable file please forward it to me. Thanks. Ken