Symptoms of Degraded Oil
  • Oil Hard to adjust valves
  • Tight packing

Oil degrades over a period of time. Sludge and acids are by-products of degraded oil. Dark color and foul odors are also indicators. A small one-time-use kit called a total acid number test will determine if the oil has degraded beyond use. TAN numbers greater than 0.7, indicate the oil should be replaced. (Tank replacement)

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