Hi,

I just bought the 2005 T&C and changed all filters as well as the oil. the recommended oil for this engine (3.8L) is 5w20. i used mobile full synthetic oil which i have been using on my 2001 caravan for the last 6 years. After the oil change I noticed a rattling noise from the engine. It sounds like the valves but is quite annoying. I don't remember hearing this noise before the change (I may be wrong). Does it mean that this engine doesn't like synthetic oil? What difference would it make if the grade remain the same? i appreciate your comments.

Thanks