Oil sludge

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Oil sludge or black sludge is a solid or gel in motor oil caused by the oil gelling or solidifying, usually at temperatures lower than 100 degrees Celsius. Oil sludge can be a major contributor to internal combustion engine problems, and can require the engine to be replaced, if the damage is severe.

Causes[edit]

Sludge is usually caused by a poorly designed or defective crankcase ventilation system, low engine operating temperatures, the presence of water in the oil or crankshaft-induced cavitation, and can accumulate with use. Oil sludge that causes an engine to run poorly or even seize is a rare occurrence and typically happens only when oil changes have been neglected or if the car has been driven extensively with an extremely low oil level.

Precautions[edit]

Ways to minimize sludge production and accumulation includes performing frequent oil changes, performing mechanized engine flushing, or de-sludging, using synthetic oil,[1] and following the manufacturer's engine maintenance routine. Chrysler, Dodge, Audi, Volkswagen, Saab and also some of Toyota, Lexus models are known for oil sludge problem.[2]

References[edit]

  1. ^ Norris Schleeter and Melanie McCalmont (25 September 2005). "Oil Sludge: an expensive but preventable disaster". www.schleeter.com. Retrieved April 28, 2010. 
  2. ^ Consumer Report 2005 (2005). "The black death of sludge:A costly problem". www.consumerreports.org. Retrieved November 6, 2014. 

External links[edit]

  • schleeter.com; a technical article about oil sludge, with photos.