Today I drove all the way to Jacksonville airport, a two hour drive, the longest trip yet, and I had not problems. This drive completes a certain circle: when the car was originally shipped from California, it arrived in Jacksonville and I had the choice of driving it home myself. I was tempted to do it, because it would save money and I'd get to test the car. In hindsight, I am so glad I didn't because it didn't even start and had a very long list of hidden problems which I would have had to discover on the highway, barely knowing how to drive stick. Now I have driven that road for real without problems, giving me a dose of confidence for perhaps a longer trip in the future.
This test also confirms that the car's purpose of "a second car" is now confirmed. I can always it take to the airport on short travels, as long as the parking cost is less than a two day car rental cost. Today's trip plus the return trip cost about 10 dollars in gas, and 40 dollars in parking. A rental car would have cost about $60 in rental cost and about 20 in gas. Add to this the convenience of not having to rent the car using a second car, return it, etc. The truck is starting to pay for itself, especially because of the fuel efficiency.
At the jacksonville airport after a smooth ride.