Warmed it up and took it to Exxon, staying under 2,000 RPM the whole way. Let it idle as I put in $100 of 93. Stayed under 3,000 as I drove to Kin's school for her homecoming game. Set the cruise on 70 and the MPG stayed on 22 with a few flashes to 23. My intentions were to drive easy until it had another full heat cycle. Made it almost to the school when a new Tahoe challenged me to a race from a 60 roll and I have no self-control. They ended up turning into the school after me. I thought the driver was either mad or wanted to talk cars, but I never saw 'em.
Drove normally on the way home and stopped at the community center to check under the hood cuz I swear the valve train is getting louder. It's probably just me being hyper-sensitive from the PTSD. Everything looked and smelled fine and the coolant level appears to have stabilized already. I backed up to one end of the lot and stomped it to see if it launched the same as before. The ol' Steel Hippo seems to have recovered nicely from her surgery.