We're getting the best fuel economy ever here. A tank @ 86.4mpg at fuel pump.. We're in the plug-in territory guys.
900 miles in a month? How about in a day. Have done multiple 900+ miles days on the gen 3. Twice did 1k miles in a day. Key west to my home in a day. 975 miles. Cape cod to home, 930 miles. Did those trips in June. In two weeks I'll tackle bar harbor Maine to home in a day on the gen 4. All while towing a camper.
??? IMHO you'd need to average 70mph for 13.4 hours solid driving to achieve anything near that, so.... allowing for natural breaks with their associated acceleration/deceleration, that's either stretching things too far, or something else!
On the keys trip we got up at 5am. On the road at 5:30 and arrived home at 11pm that evening. Your math is about right. The cap cod trip took a bIt longer to drive fewer miles damned New England traffic. If your only doing 70mph on i95 your nearly sitting still compared most other traffic. 78 was the normal cruise setting with a few stints in the low 80's.
When I was a younger man, the farthest I ever drove in one day was 485 miles. Los Angeles >> Grand Canyon, Arizona. I think I only took one break to fuel up my Honda. That's too much, no need to push it. A vacation is supposed to be relaxing. Now days, at 64 yrs of age, and 3 spine surgeries later, I did 300 miles in my Prius... and couldn't walk afterwards. I need to get out of the car and stretch, about every 30 minutes. And that low Gen4 Prius is not the easiest car to get in & out of... especially if you are a tall big man -- with a broken back. What was I thinking! A Prius??? Great car, but maybe I should've got that nice big Highlander Hybrid.
Or the Lexus RX450h . If you go there, it is hard to go back. We were looking at the HyHi as a replacement for the wife's 4runner. Made the mistake of stopping by the Lexus dealer. Once she drove the RX450H, there was no going back. The ventilated seats are fantastic .