I’ve been searching for a OTA Coolant and found Peak European Vehicles, has anyone used this product?

Aston dealer wants 35 dollars per quart. 420 dollars for 12.quarts

 

For which car are you asking? There are many different formulations for OAT coolants. You can certainly flush and refill with any of them and most are probably compatible with the original fluid but there are only a couple of formulations that appear to match the original Havoline formula that came in my Vantage.

https://www.6speedonline.com/forums/...visited-2.html

 

I was actually going to do a complete flush and refill 100% with new. I also Plan to replace thermostat at the same time.

Thanks.

 

I'd use the Motul or Chevron stuff.