Lots of opinions, but we agree with MaseratiDoodle. We also did all the research including having corporate chemists look at the major antifreeze products. We also came to the conclusion that Prestone Long-life (bright yellow bottle) was the safest and best choice today for all cars made after 1993. Prior to 1993 stick with conventional antifreeze. There is a great product called No-Rosion that we use extensively with conventional antifreeze to extend the life to five years. It will also work with long-life products. It is the real deal and you can check their website for more info.