I removed my oil cap and it is dirty inside valve cover and cap. What is the cause of this is it going to cause damage?
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1997 Lexus ES300 Question: dirty oil cap
Answer #1hemicuda March 30, 2010, 20:47Master
This is usually oil sludge and just keep having your oil and filter changed regularly and it should be fine
patrick mannion from Greg Solow's Engine Room, March 30, 2010, 20:51Master
Lexus changed/shortened the recommended oil change intervals due to a build up of sludge in these engines. Initially the oil change intervals were too long, great engine, change the oil every 3000 miles and should be all right.