Best Coolant
 

What is everyone's preferred coolant?

I've been running the Prestone Green 50/50 all these years, but I noticed that some other coolants specify European, etc...

Is my coolant fine, or is there a better option for the D24 platform?

My preferred coolant is strictly ZEREX G5

Automaker approved for Ford Chrysler Mercedes Heavy Duty DIESEL.
I have the 50 50 premix but I also keep a gallon of pure G5 for adjusting into colder season without having to take too much coolant out.

It is a gold bottle... finally available in nearly any auto store. That wasnt the case a few years ago.

I recently bought a d24t that was serviced by Volvo and the coolant was interestingly a blue color. Probably at Volvo they still make their own antifreeze? Not sure.

The G5 isnt expensive. For a full cooling system fillup though a d24 needs about 5gallons I think.

Greenbook specs coolant capacities 10.5 - 12.5 quarts. Roughly 3 gallons. Depends the radiator size and transmission.

Correct, it is 3 gallons, not 5. Sorry for the mistake (I bought the 5 gallons for two cars)

940 tdi auto 1995
 

hi all
ive been using volvo genuine coolant for 20 years on current D24 up to 274000 now not to expensive when you do it your self !!