Yes: The Peak Final Charge is a very robust ELC HD Diesel coolant.
According to the Literature it is far superior to the Mopar OAT.
If I could only find out for 100% certain that he could just drain the coolant the replace the hose and refill with the Final Charge with never an issue that would be awesome.
I am thinking very hard: Since Both coolants are OAT he will not have to do a complete flush.
Local WM had the 50/50 FC for $12.47 gal
The 100% Concentrate is virtually impossible to find locally. Which I guess is smart (Keeps owners from going retard and adding tap water).
If I remember right the Final Charge is good for almost 600K miles.
I guess I could contact Peak and ask them.
For those that are curious about the coolant I am referring to here is a bit of info.
https://www.sinclairoil.com/sites/default/files/PEAK FINAL CHARGE 50-50.pdf
Once I find that these 2 coolants are 100% compatible with no future ill effects I will switch over. First I need to find a proper drain procedure.
Note: I wouldn't even bother if I only had plans on keeping this 2017 Ram for 3-4 years. She is going to be in my possession well into my retirement so this is for the future not just for $hits & Giggles.
This is what I found today: OAT coolants are cross brand compatible. Peaks Final Charge OAT coolant is currently used by Spartan in their chassis - Cummins Fleetguard Division which originally made an OAT coolant called Optimax but this has now been rebranded as ES Compleat OAT extended life coolant.
Caterpiller offers its own CAT ELC coolant, which also uses OAT technology. (All 3 are 100% compatible so if you cant find one brand, you can go into any truck dealership and pick up one of the others at the parts counter).
The majority of the OAT coolants are orange in color, although they can vary, so color alone will not determine OAT status.
Shell's Rotella ELC is more of Red in color. It too is a ELC that can go 600K miles.
However it is not a true OAT coolant so don't go mixing this with any of the other brands of OAT coolants..
Take all this for what it is worth.
Sad thing is: There Just is not much info out there informing customers who supplies FCA with their Mopar OAT coolant.