If you want to know about car lubricants, I have some knowledge of it as I am working in a lubricants manufacturing plant. If you ask me about radiator, the only thing I know about it is you must not let it go empty unless you want to risk your life! Yes, an empty radiator can cause any car to catch fire and explode!
However, let me suggest a website where you can find Radiator Tips, Hints and Articles plus getting the highest quality radiator with the lowest prices. Check out Radiator.com. Almost every car models are there. Just to name a few; there are Honda Accord Radiator, Toyota, Alfa Romeo, BMW, Citroen, Datsun and many others.