Downunder ours is, lowest 91 unleaded, then 95 and premium 98. Then the 10% ethanol blends E85 etc. Some smaller servo's do a 100/110 but not a normal thing n hard to find most of the time. I just run 98, i fill up when its under $2 per litre then wait for it to go back down from $2.40 a litre. Usually get 4 to 6 weeks out of a tank, thats 3 or 4 days dd to work. Most of my cars wont run on 91. I even took a car in for engine/gearbox repairs because i thought it was stuffed but a mate had borrowed the 4wd n filled it up with 91, cheap crap. Had to drain the tank to fix issue.