My vans antifreeze is quite weak due to a slow leak I can't find. (leaks onto floor so its not a gasket issue) Don't want to do a full flush until I've found the leak, van has pink stuff in there at the moment, which I believe is 5yr stuff. Bottle in shed is blue (3yr stuff?) which is redundant now as I would want to use the pink stuff in the current car.
Can I top up and mix the two? Also, is there any types of antifreeze that aren't compatible with each other? My van is an Iveco and takes heavy truck engine oil which is normally only used in HGV's, but is all antifreeze the same? I have a workshop manual that gives all the details but haven't been able to find it!