I'm topping it up, but only to a point above the minimum level - since it's not a constant leak, and I can't figure out a pattern to it, I figured there's no sense wasting coolant by filling to the max line.
Yesterday was a great example: coolant leak in effect, and needed to refill. Added coolant mix to a 1/3 between min and max markings on the tank. Leak continued, and could see a drip trail on the road/driveway when I went to visit my dad.
Drove home and parked in the lot; checked a couple hours later, and no coolant puddle; nothing this morning, either and coolant level seems to be holding.
It's gotten to a point where I keep a spare jug of coolant in the trunk because I can't tell if/when I'll need it.
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