Best Antifreeze/ coolant for M1165a

[theairguy]

Looking for the all around best coolant for a 6.5 Turbo in a M1165a. I don't want to have to add additives all the time or have scale build up. What are your thoughts.

 

[Retiredwarhorses]

Standard 50/50 green coolant, green is made for cast iron blocks

 

[Mogman]

This has been discussed quite a bit, general wisdom says use plain ol inorganic or IAT which is what we all used for decades now there is organic OAT and even hybrid HOAT
The problem is it is evidently cheaper to produce OAT and even if you ask for good ol green you may get OAT just dyed green, read the labels

 

[DREDnot]

If you cant find 50/50 premixed, Make sure to use distilled water to dilute to 50/50.

 

[87cr250r]

Some engine manufacturers want sodium nitrite in the coolant to prevent liner cavitation. These are the HOAT coolants. If you have a Caterpillar dealership nearby buy their ELC coolant. It is a HOAT.

You will not find an IAT coolant at an automotive parts store. If for some reason you want to run it, Caterpillar still sells one called DEAC. The IAT coolants require periodic dosing with a supplemental coolant additive.

 

[Mogman]

IMHO the best thing is to pick one and do a COMPLETE flush, then stick to that part number, if you mix IAT and OAT you can end up with a mixture more corrosive than straight water and it can turn into a brown sludge.
The last IAT I purchased was in an auto parts store, never use an "all vehicle" antifreeze which are all HOAT
Prestone, Zerex and others still make IAT although you have to look for it, Summit Racing carries the Zerex

Zerex ZX001 Zerex Original Green Antifreeze and Coolant | Summit Racing

Free Shipping - Zerex Original Green Antifreeze and Coolant with qualifying orders of $109. Shop Antifreeze and Coolant at Summit Racing.

www.summitracing.com

 

[DaneGer21]

IMO whatever the cheapest 50/50 premix is!