Hi all, I am new here and want to ask you experts a question about my wifes brand new chevy venture minivan. Whenever it is first started in the mornings it has this clattering sound for like 1/2 a second. Sounds like the bearings are dry and has to build oil pressure. I switched to Mobil 1 5w30 the first oil change at 2,000 miles.It has 3,800 miles now. I have had alot of vehicles and none have ever clattered like this at startup. It only does it after sitting overnight. The dealer says this is normal. I dont like the idea of the engine having to take that long to build oil pressure. It is only for 1/2 a second but I wouldnt expect this from a brand new vehicle. Any insight is appreciated.