Hi..I was searching around looking for the capacity on old threads because I want to change out my antifreeze in my NA roadster. Sorry not trying to hyjack your thread but on several I have looked at I am kind of surprised you guys are running regular water based coolant and was wondering if there was a reason. I always switch out coolant in my vehicles with Evans waterless coolant. If you get your system free of the old water stuff you never have to change it or worry about corrosion also your cars run much cooler. I have never had a problem in the past using this on vehicles but never have used it in a crossfire.Its $34/gal so i didnt want to use it then find out I had to drain it for some reason. hope this helps someone.