Should I put a fuel system cleaning agent in my Chrysler 200 gas tank? An auto repair shop was up selling me with the suggestion that I needed a fuel induction Service. Mileage is 110,200, I don't have any rough idle, the vehicle doesn't have the speediest acceleration being an older car but there's no noticeable hesitation. No back fires and no engine light on. But, at this mileage is it a good idea to do the service or would a cleaning agent do just fine? If so, what product(s) do you recommend. Thank you.