Probable head gasket

Updated Bar's stop leak report. I've now put over 2000 miles on the car and everything is still fine, no leaks, no rattles, coolant level normal and it's running smooth. Like most of the USA it's been really really hot here with heat indexes over 105 for days in a row but that hasn't affected the car. It's not our primary driver and sometimes sits for a couple of weeks but I've been driving it daily most of July and all of August. I know this may be a rare example of success but I recommend trying it, but not using the whole bottle. I used just a third, about 11 ounces and closely followed the instructions. Has anyone else tried Bar's, in any car, and it worked ?

 

Success is six to twelve months without heater, radiator or thermostat clogging which compounds a worsened situation later.