Antifreeze PEAK or Pentosin
Ive been using peak for a while across a 2016 jetta when i owned it and now in my 2021 tiguan. Works fine
Pentosin is one of my trusted brands. I would not hesitate to use it.
Had good luck with their older Asian green, Toyota pink, and Newer Asian Blue in my son's Subaru.
I have some Peak "original equipment technology" for European vehicles, "violet." It is pre-diluted. It seemed to immediately blend right in, if that means anything.
Find the peak brand equivalent. That's what I use for 2021 RH Model. Make sure specifications match. Properly flush your coolant system before implementing and properly bleed and burp the air out before taking it for a ride. Do not leave air in coolant passages. I've had no issues with different brand coolant and oil.
I bought a 19 SEL brand new and have been using the Peak exclusively. I’ve had no issues.
I used the PEAK pink stuff for Asian vehicles in my 2004 and 2006. Good stuff.
Using an AMAM coolant (typically yellow - “All Makes, All Models”) is the safest thing you can do. It has none of the nitrites, borates, silicates, etc. that can cause issues in various systems. It’s really one coolant that works everywhere. Peak 10X is a solid choice in that realm.
you can use peak, most likely it will be fine, it may just cause your radiator and heater core to clog. i used to run it with absolutely no problems. i now just prefer g11/g12
I don’t use peak anything. it’s actually not great coolant.
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