Interesting results yesterday. I put my coal basket on the coal rack of my Weber kettle, all vents closed made sure to have a good seal on the lid around 7pm. Put the dogs out at 10pm before bed and and the kettle thermometer still registered approx. 200F and the lid was hot to the touch. This morning at 5:30am the lid was still warm to the touch and some coals were still burning. The coal basket was about 1/3 still full. I gave up, took the lid off and let the coals burn themselves up. The difference was I used Kingsford Pro for a shorter cook of a 3lb boneless pork loin.
Anecdotal observation is Kingsford Pro is less likely to be snuffed out versus KBB???