I think you're breathing in
I think you're breathing in too many gas fumes from the fuel savings you think you're getting with the auto start stop. You shouldn't have to keep turning off the auto start stop every time you get into the car and start it. I don't see how you could be saving fuel when you continually have to restart the car. Also, I wouldn't count on a long lifespan of your starter and battery but I will guarantee the cost to replace them will be far greater than the fuel you might possibly save.