I wonder if there is merit in switching to the green on my suburban? Its got the red coolant in it, I haven't changed the coolant in the 1.5 years I've had it, and lately it's been reading low coolant when parked nose downhill...Recovery bottle stays in the neighborhood of full cold (but does fluctuate), temps have been normal too...
That is the kind of problem that makes me mad at Gm for not designing a proper radiator cap to check what is in the actual radiator.
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