Can you just start adding that Engine Ice as needed or do you have to flush the whole system and put it in? I guess in other words, can I mix the Engine Ice with the stuff already in it? Also, where can you buy Engne Ice from? Sorry to get off topic.

 

i guess you could but you would be diluting the effectivness. draining the system is not as hard as you think, its just like changing the oil, a couple of drain plugs, refill.