How do we know how often to use a fuel system cleaner. Is using something like FP every tank over kill, or using something like Techron every oil change not often enough to keep the fuel system clean? I am trying to determine how often I have to use a fuel system cleaner(I mainly use non-branded gas) to keep my fuel system in top shape. Is there a consensus on the board on how often we really need to add fuel system cleaners to our vehicles to keep the system in top shape? Don't want to waste my money and time on overkill products but want to make sure i am adding an additive enough to keep the entire system clean as can be. thanks for the help