I've been using extended life coolant with distilled water in all of my trucks with out a single problem. Make sure you get all of the green out. I just sold a 1995 Int t444 with 550k that i didn't have a single cooling system problem with. I bought it with 100k and replaced the coolant at that time. Its still making money today.
Thanks as usual. Any idea how to test the coolant for the proper DCA levels? When I had powerstrokes, we had the old test strips, but are they the right ones to use for a DT466? How does one know how much additive to add and what the % should be?
To be honest, I've just been adding a little here & there to keep some sort of charge in there.
I bought the fleetguard DCA60L (says DCA4) additive from an international shop, and I asked the guy for test strips as well. He sold me Fleetguard 3-way test strips that say the measure freezepoint, molybdate, and nitrite.
It says that that will give me the SCA levels, so I probably have the wrong strips then? Is there an SCA additive as well?
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