Syns aren't counted just based on calories. Syns take into account the ingredients used, and the rest of the nutritional information like fat, carbohydrates and proteins.
I don't know why only Frylite seems to be free out of all of the spray oils, I've never investigated it to be honest. But if you don't want to count the spray oil you are using then don't. I just know I would have to count it or I start not counting other things and then I spiral off track lol