First of all sorry if in wrong section, ive used the search bar but getting mixed information. Does anyone know for definate if i can add honda blue coolant to the green coolant thats in the car now, expansion bottle is just under minimum and not got time to drain system and replace with all blue. Traveling 200 mile trip tomorrow too. Phoned two honda dealers first one said no and my local one said would be fine. Anyone know for definate? Also where should the coolant in the bottle sit when cold minimum/halfway/max Thanks