At 48,800 miles, the check coolant additive light came on. I pulled into the nearest dealer to get it out of the way. We checked the coolant, first time for the dealer tech guy. The test works like...if the color is right (orange) on the first test, you're good. My first test was closer to brown which moved us to the second test, which passed. If the second test fails, you move to changing the coolant. I have been tempted to just...push
the button and reset the coolant condition. With 2 water cooling systems, new metals...it might be a good idea to not just...push the reset button!!