I filled the Jeep at the big Pemex on the right side of the road before you cross Rio Sonoyta in Sonoyta this afternoon on the way home. Put in 12 and a half gallons of green. I had filled the Jeep with green on the way down at the Circle K Pemex on the right side at the crossroads in Sonoyta on Friday. I know it was really hot this afternoon ( We travelled between 2:15 and 6:30) and she had a pretty big load and we were running the air on the next to highest fan speed (3) but she was pinging and running about 10 degrees over normal. I have used Mexican green without any issues until now. Do you all think it was just the heat, weight and A/C together? I am going to fill her with high test tomorrow. She has never done this before........