That's a very good point. Most other states have highway speed limits of 70 or even 75 and we are maxed out at 65. If she reduced her speed, that would definately have an effect on economy.

I'm not sure where the idea that we have higher octane gas comes from. At least on the pump rating it's not any higher than most other states and is actually lower than some. But maybe I'm missing something.

Ironicly, common thought used to be the Oregon had the worst gas of the three western coast states, because ours was supposedly unregulated and so gas that was unsuitable for California and WAshington got shipped here. I have no idea if there's any validity to that or if it was true isn't anymore or ever was.

I know the vast majority of our gas comes from the major refineries of Washington state with the remainder coming from California refineries, last I checked.