Your picture is far from distinct- - - -what sort of debris is that imbedded in the filter? If it's soft sludge, I'm going to guess you're running some sort of non-detergent oil. If you're running HD oil, there must be something going on to contaminate it. I'd recommend running some type of crankcase flush product, or simply add a couple of quarts of kerosene or Diesel fuel to the oil and run the engine at a moderately fast idle for 15 minutes, then drain while hot and refill the engine with clean oil and a new filter.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!