Coolant Test

[walterk]

I decided to change a coolant in my truck - 2019 cm2350. The coolant had 450000 miles on it. After reading about what coolant to use I decided to pay a bit more and get the premium stuff.
I purchased Final Charge Pro-Series, 50/50, 1.5 million miles, red. ($20 a gallon)
I drained my old coolant and it looked really good. I compared the old one with the new one and the new coolant looked a lot lighter. Werid, I thought. I got new sealed Fleetguard test strips and decided to test it to satisfy my curiosity. These are the results:

attachment=9186]

The differences were a lot more pronounced within the testing time - after 45 sec and before 75 sec time period.