White Smoke

I have a 1998 Sebring JXI that smokes when I idle. Also since I had the oil change by the dealership my oil light flickers. I checked the oil and it was good, not low. it went off and did not come back on until a week later. The smoke is white. I only have 97,000 miles on it bought it a year ago . Please help before I carry it to a service center and get robbed.:shakehead