I thought I did on the other page. It goes from about 80 to close to the 100 degree mark or just a little over. But then as soon as the traffic light goes green and I accelerate it goes right back down to 80. It probably does that in about 5 seconds or so.

I notice that the longer I drive the car, the quicker it is to heat up at a light. But the temp gauge always goes back down. I tested it a few weeks ago by letting it sit in park for awhile. After it got close to 100 I put the car in drive and drove down the block and the temp gauge went right back down to around 80

The only difference I have seen in the car since the 2 plus years the stupid dealer said I needed a head gasket is that it is loosing more coolant.