I have a 2007 nissan versa, making rattling sound all the time.
It has 86K miles on it, bought at 83K.
I had changed the oil at 83K (Castrol edge)and as per the advice, changed my oil with flush (NAPA)to remove the sludge on the oil pump, this time i used Mobil (Advanced full synthetic. I can hardly find 10% improvement.
Please help me.