Illumination of the Check Engine Light may be the result of a loose or worn gas cap.
Oldsmobile Cutlass Supreme Problem Reports
Most Reported Oldsmobile Cutlass Supreme Problem Reports
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Acid may leak from the battery at the cable connections, resulting in corrosion on the battery cable ends and in the battery tray. A Leaking battery should be replaced and the cables thoroughly cleaned or replaced if necessary.
It may be a unique problem but my car has oil leaking into the radiator.