I'm old-school. I drive a car 1500 miles and then do the first oil change. Then I do the next one at 3000 miles, and every 3-3500 after that.
I also had 3 cars go over 250,000 miles without burning oil.
Five-hundred miles is approx 8 hours. I would prbably go pretty easy for the first 1,000 miles, secondary roads and short stretches on the highway around cities. This will do two things; allow the machine to run at something other than wide open, and force variations in load and speed like the manual says to do.
It seems I can tell when a car was broken in properly or not. On cars I had had new, they don't tend to develop 'notches' at certain speeds. By this I mean, on cars other than ones I bought new, I can notice that the car seems to hit a stride ~45-50 MPH, and another ~70 MPH. What I assume is that the person that bought the car new had two driving modes: secondary roads (45 MPH) and highway (70 MPH). I have noticed this on a few used cars I have owned.
On cars I bought new and broke in properly, there weren't any 'notches', everything was fairly even across the range.
You will hit speeds and conditions on any car, no matter how it was broken in due to engine and mechanical efficiencies. On most 4 cylinder Toyotas I have owned, they seem to hit their stride 70~75 MPH, since I assume this is the engine's most efficient mode. I have noticed this on 4 or 5 Toyotas I have owned. Always got the best economy at about 72 MPH in 5th gear.
Of course, with newer cars and a V6, things are different now, but I would still take it pretty easy for the first 1500 miles, and stop and have the oil changed.