Um, yeah, er, the cell phone thing was apparently a cut and paste thanks to the touch pad on the laptop and had nothing to do with the conversation.
Anyhoo, for most of the time I have owned the car I have had about a 100 mile a day commute, mostly done at 75 mph. It had around 50,000 miles on it when I bought it, and it is about to roll 250,000. It went from Texas to Michigan, picked up two additional passengers for three total, and then drove to Longview Washington. It has been used to tow an old Jeep postal vehicle on a few occasions. My point is, if running this engine at around 4000 rpm were a cause of burnt valves, I would have burnt a bunch of them by now.
Power to the Phoenix!!
MMM