Own a 2004 3.3L Highland. Have 300,000 miles. Changed oil anywhere from 5,000-15,000 with every different flavor of 0w30 or 5w30. At 290,000 both valve covers were leaking, cracked air intake box, and the vehicle is not cleaned very often. Changed the VC gaskets, timing belt and spark plugs. Car still runs and expecting to get another 100,000k on it. Original motors and original transmission. This SUV is something else.
Pics - 2005 Highlander 3.3L 158k miles
- Thread starter dkryan
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Looks just like my 1MZ with 250k mi when I replaced valve cover gasket due to seepage.
Still runs like a top.
Wouldn't change a thing...
Still runs like a top.
Wouldn't change a thing...
Just to think I have seen conventional oil engines cleaner when pulling valve cover to adjust valves but this board almost convinced me I was just lucky. Even synthetic oil gone to long can cause dirty engines. Now let me go back to what I know. Conventional oil between 3 to 5k. LOL
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