I am going to drain/fill the coolant in our MDX this week with the genuine Honda blue coolant. At one time, Cadillac would recommend putting those organic sealing tablets in with a coolant change. I understand that Subaru has these as well. Cadillac folks considered them good preventative maintenance when doing a coolant change. Does anyone with a Honda/Acura use these? There are no leaks in the system now of which I am aware.