[hayden55]

Why would the car need premium fuel, is this in writing some where? They have been 13:1 atkinson cycle since the beginning. I will agree that premium fuel is probably going to see a benefit in knock reduction and timing increases, but the cars have been rated for 87 for a long time. I know very few cars that get a mpg increase high enough to warrant the 20% extra fuel cost for premium here in a normal state with normal fuel prices.
Also, if anyone thinks a Chevrolet Bolt will be cheaper to own that a Toyota Prius is not wise. GM is so good at building unreliable cars that you are told not to park the Bolt in your garage for safety. WTF is that lol
Honestly, with the price of electricity and regular gasoline here locally and considering pack replacements on a bolt and prius in the future around 10-12 years on average... I see no roi on a Bolt over a Prius. More than likely the Bolt will be much more expensive to own. I'm convinced the Prius is the cheapest car you can own if you are slightly handy. The $150 difference in registration fees every year already cancels out the fuel saving here locally so its really a non starter just from that.
But Toyota is catching up with them here lately so we will see. I've seen quite a few issues with the new priuses vs the bulletproof gen 2. The gen 3 technically can be made bulletproof as well but it isn't emissions compliant when you do. But you could reverse the mods in 30 minutes and go pass an emissions test and then go back to normal.
Fun fact: GM is the leader in recalls for the last 22 years.