I bought the car used and the original aluminum radiator developed a gash in its plastic top, it got replaced with a brass radiator. Since then, I've always used Prestone ethylene glycol (the green stuff) in it. The coolant is now almost 3 years old. Today, I measured 0.45 volt across the coolant through the radiator and an engine ground which I gather is more than the threshold of 0.2 volt (Am I correct here?). Is the blue Honda coolant suitable for this car? I kinda like the 10 year/120,000 km time to change limit it has, according to the printed info that my newer 2 year old CRV has under the hood.