Coolant question

[RJI]

Hello, just did all my 50 hr Max 26 maintenance this wknd... Need to top off the coolant... Manual doesn't say what to use... Is there a certain brand or specific type for Diesel engines, or will any type coolant do....
Thanks

 

[4570Man]

Any antifreeze will work. I have used straight water, but make sure to add antifreeze before winter.