Wires aren't that old, 3 years and 80k. I'll have to poke around and find my old phone and set up Torq to watch coolant temp, I guess. Motor does use a quart over 5k, but where I don't see oil on those plugs I don't think the valve guide seal are bad--maybe it's blowing out the exhaust, but I'd think bad seals would leave a bit more oil on the plugs, being in the center of the 4 valves and all.
I put in the new battery (Everstart 24F) and new plugs (NGK (3452) BKR6EKPB-11 Laser Platinum) on Christmas Eve. Started just fine. Couple short trips that night. Put 200 miles onto it Christmas for a trek to the MIL's. Day after did 200 miles back home. No issues, although it wasn't that cold (freezing or so).