So the coolant in my expansion tank is low and I wanna fill it up before any air starts getting into the system. I have a 2003 Honda Shadow and the service manual says use a coolant without silicate corrosion inhibitors because it may cause premature wear to the water pump seals and passages etc. I looked at some products and the obvious choice seems to be Prestone. What I want to ask is if it is absolutly important that I get coolant without these inhibitors or not? Prestone products say the inhibitors are non-abrasive. Im somewhat apprehensive. Anyone know if it's alright to use it with or inhibitors?