before anyone gets the wrong idea this is my finding for my commute and not saying it doesnt work

Over the last month i decided to see if the start stop affects consumption on my commute
so my tank does me 10 working days / 120 miles with stop start on.
but with it off its exactly the same over the same period/120 miles
so in my situation the start /stop doesnt actually save me anything or if it does its only minimal
has any one else tried this??
as i say this is purely someting Ive tried and am not running the idea down or anything,more curious to see if anyone else had different results??
cheers Trigg