Antifreeze
Manufacturers
PEAK Antifreeze
Ok-Awareness3648
  • Temperature stability:
Rating 5.0

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.

Pros: no issues with coolant
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RED LINE Antifreeze
-TinyTM-
  • Temperature stability:
Rating 3.5

For track use only, dries like normal water when spilled, doesn't leave slippery residue. Please run normal coolant specified by the manufacturer, it has additives that stop your engine from rusting internally.

Pros: dries like water, no slippery residue
Cons: lacks rust inhibitors
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OEM FORD Antifreeze

I have the 6.7 power stroke, but 2015. My manual says to use a certain Ford coolant (orange IIRC) but it’s been updated since then and everyone considers orange “detrimental” today. Hell I don’t even know if you can still buy it, it’s “that bad”. It got replaced by another Ford coolant, but you wouldn’t know that just looking at my owners manual.

Cons: old orange coolant detrimental, old coolant bad
Vehicle: Ford
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