Slant Temperature

I don't get scared until things start to crowd 220 degrees. I've had a slant six get up to 240 degrees before three separate times due to a disintegrating radiator, a broken fan belt, and a stuck thermostat before with no noticeable long term damage. I believe the Rotella 15W40 with a blue bottle of STP and Wix filters probably helped make a difference, though.