Originally Posted by Gray_Ghost
What do you all think, worth the effort?

The simplest, most effective sludge treatment is two quarts of kerosene or Diesel fuel. Fill the crankcase with fresh 30 weight oil, then add 2 quarts of solvent. This raises the oil level enough that the crankshaft can whip the lube up into a very effective cleaning agent. Run the engine at a slightly fast idle speed (1200-1500 RPM) for 20-30 minutes. Then drain the oil while it's hot and refill with fresh oil. The dissolved sludge will drain away with the oil. Just DO NOT drive the vehicle or put any other type of load on the engine. The solvent compromises the film strength of the oil enough to damage a loaded bearing. Running "no load" is OK.
Jerry

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