I'm looking at a fluid flush for my 2010 Nissan Altima. I want to ask if there are concerns or benefits to using a lower coolant ratio. I travel to Kansas for the holidays, where it's quite a bit colder in the winter. I stay for several days. Also, do you recommend additives for the water flush portion, and for how long to flush with water before adding coolant again? Thanks.

1 Answer 1


Coolant formulation is just as the terminology suggests. It's not "only" anti-freeze, but a combination of chemical substances which provide optimum heat transfer as well. The ratio recommended for a specific manufacturer's product will cover hot and cold weather equally well, unless otherwise specified on the label.

As you've created two questions in one post, I have answered only the one with which I am familiar. Perhaps a second post to ensure compliance with the rules is in order.

  • Don't forget corrosion protection.
    – Moab
    Aug 3, 2019 at 23:13
  • Antifreeze raises the boiling point , so it is important in hot weather as well as cold. Aug 3, 2019 at 23:40

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