Youll pay for at least some of the "money saved" in worse fuel economy. All that program is doing is putting it into the 87 octane mode all the time, instead of it figuring out on its own. I was taught to run 5 tanks of regular, and 5 tanks of super, and compared average economy across them. Youll see that its costing you more to run regular in the mileage and power loss alone, and who knows what going on inside the motor from running like that long term.