Just got back from a five hour drive in Dusty, and here's what the underside of the oil cap looked like after shutdown. Outside air temp was 35 degrees. Car ran excellent all the way. Coolant level doesn't seem to be diminishing. Oil on the dipstick looks like honey and appears uncontaminated. Maybe this is just normal for this engine in our cool environment, and the fact that it's not a daily driver. I don't suspect that it's a blown head gasket, as it was just replaced in the engine rebuild. I'll keep an eye on it. The engine itself runs very well, as I mentioned. I'm probably just overthinking it. Thanks to all who weighed in!
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