I recently picked up a 96 impala. It has had dexcool in it apparently its whole life (150,000) My other 96 I run the green "works in any type" antifreeze, I was thinking about flushing it and refilling it with the same and leaving the dexcool. I need to exchange the resevior due to a crack and was thinking while I was there I would flush it and re-fill it with green.... Any thoughts?cwm6