I read an article written by a guy who drove a vehicle with stop/start technology who did mostly city driving. So best case scenario. His average savings amounted to 92 cents/month. Long story short, disable it if you can.I've bought/owned several cars and have had to replace batteries in all of them. I can't imagine owning cars and never having to replace a battery in any of them, but we rarely keep cars for less than 5 years. Now with cars transitioning to push starters and auto start/stopping it's even more brutal on the batteries, the AGMs are great but still.