11991 Accord DX heater cable

Personally, I avoid additives, especially if you are following the vehicle’s maintenance schedule properly. Just make sure to get a quality coolant, either premixed or buy distilled water to get the proper 50/50 mix, and drain and fill the system. I’m sure you’ve seen it, but I’ll link Eric’s video on bleeding a cooling system. Follow those steps, and you should be good to go for another 100k miles, especially since you said you don’t have any problems anyway. Good luck man.

Eric’s coolant bleed video:

http://www.youtube.com/watch?v=zUpXgAJ1gjU

Note: You do NOT need a bleeder valve. Most cars don’t have them. Just ignore that step, unless your car does happen to have one.