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Originally Posted by motordavid
Have you tried something as exotic as checking the oil and maybe
adding a qt or so?
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I think there is a part # on the fan cover near the front of the engine if you wanted to get "the exact" oil from your stealer. Otherwise, MD is absoultely right on the other oil suggestions. Any good quality synthetic oil will work. I use 5W30 in my 02 4.4.
If you have an extended warranty I would get the inspection II done somewhere so your warranty holder can't say you didn't perform all necessary maintenance if something goes wrong.