yep i agree,and if that dont help try a little heavier oil. that is what im going to do next oil change. at the current time(with new sender unit) it is 40 when cold and drops to 20 when hot(@ 2500 rpm or so).im currently using 10w 30 im going to jump to 10w 40 and see what happens.
likely like mine it is pretty worn(mine was abused by the previouse owner) leaving a bit more wear. a slightly heavier oil can take up the space and make it run as it should,or close to it anyway. oh i almost forgot the book we have at work actually says chrysler recomends 20w 50 but im not sure i would try that yet.