1997 Lexus ES300 Q&A

1997 Lexus ES300 Question: dirty oil cap

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? -
Answer 1
This is usually oil sludge and just keep having your oil and filter changed regularly and it should be fine -
Answer 2
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. -