Hi. I have a 2005 3.5L Altima that makes a terrible ticking noise when I start it up. We have changed the oil and now use 10-30w instead of the 5-30. it seemed to help a little bit. But it still makes engine noise until it is fully warmed up. Otherwise there are no performance issues and no engine lights on. I have had the car for over four years and it has just started happening in the last 6 months or so. any suggestions?
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