Got a 2014 Dodge Dart 1.4L with 110,000 miles. Once it's warmed up the oil light comes on while waiting at a traffic light. If I rev it to 1,000 or 1,200 rpm it goes out. Also hear some engine noise or maybe slight knock when warm that isn't there when cold. Doesn't smoke. Thinking of options before getting a junkyard engine. The oil looks brand new so somebody thought a change might help, just don't know what they used. How about trying 20W50 or even thicker single weights?