Oldsmobile Questions? Ask a Mechanic for Answers ASAP
Does this vehicle have the 4-cylinder or 6-cylinder engine?
Ok, the "normal" operating temp for this vehicle is around 195 degrees or so (give or take a few degrees is ok). So, no, the gauge should not normally go above the middle line.
You should not have to keep adding water/coolant to the vehicle at any time. The system should be sealed and there should be no "burn off". If you are having to keep adding water/coolant, then there is a leak somewhere. Unfortunately, these 3.4L 6-cylinder engines were very well known for having head gasket problems. At this point a cooling system pressure test should be done. This is where a tool is installed onto the cooling system and then pressure is pumped into the system. If the gauge on the tool does not hold steady, there is a leak somewhere. If my answer has helped you, please help me by leaving a rating or accepting my answer so I may be credited. Rating or accepting my answer does not cost you extra. It allows me to be credited for my work. Please rate or accept so I may be credited. You can ask follow-up questions after you rate or accept.