Lexus IS 300:  Blue Smoke → Causes & Diagnosis

  A very common problem that affects all vehicles (including the Lexus IS 300) is blue smoke coming from the exhaust.  Reasons for blue exhaust smoke include bad valve seals, valve train wear in general, the PCV valve, burning transmission fluid and more. Blue smoke indicates that your IS 300’s engine is burning oil.  The … Read moreLexus IS 300:  Blue Smoke → Causes & Diagnosis