Need to flush the coolant in a 99 Honda Civic EX, and a 99 Honda Accord EX V6. I'm sure that both came from the factory with the traditional green coolant, but I'm wondering what would be the best choice for a replacement. Both will receive a "T" flush (with a chemical flush, because I don't really know each car's history), so there will be no "mixing" issues. Should I use something like Prestone All Makes, or some sort of Asian formula. I hope to be able to use the same product in each vehicle. As always, thanks for any help!