{Chrysler 300} Re: Antifreeze/water mixture ‘65 300L

[Dyke Ridgley <ridgleyracing65@xxxxxxxxx>]

I would advise you to go to the "No-Rosion" website and read about coolants and mixtures. They will tell you more than you ever need to know and they are straight shooters. I can give you my recommendation, but they are the real knowledgeable answers for your questions. We have used their products for over 30 years and have only good things to say about the firm and the owner. We use 25% conventional antifreeze, 75% RO water and 1oz No-Rosion per quart of coolant. Keep two years, add No-Rosion (same amount) every year starting with year three and change everything at five years. Use this on all the cars in the collection.

Dyke Ridgley

On Thursday, March 26, 2026 at 10:00:08 AM UTC-5 grantqb18 wrote:

Hello all, after flushing the cooling system, what is the proper antifreeze and water mixture to refill after flushing? Getting ready for summer driving out here in Northern California. I grew up in the Prestone antifreeze days with my ‘69 Cougar and ‘76 Eldorado. This is my first mopar experience and loving it. Thanks in advance to all.

Sent from my iPad

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