How do I remove oil sludge from engine?

1994 NISSAN SENTRA
135,000 MILES • 4 CYL • FWD • AUTOMATIC
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SLICKRICK
  • MEMBER
  • 7 POSTS
put too much oil in engine
Sep 8, 2011 at 4:53 AM
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CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
How much is too much oil? Overfilling the oil is not what forms sludge. There are a lot of really good additives in today's oil so sludge buildup shouldn't be a problem if the oil is changed on schedule. If the buildup is really bad, an old trick is to add about a quarter of a quart of automatic transmission fluid to the oil, drive the car for a day or two, then change the oil and filter.
Sep 8, 2011 at 6:17 AM
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