Unfortunately, we don't have that choice in most of the USA. The farmers corn lobby is quite powerful. If you can find non ethanol gas (lots of stations near the coast have it for boats), the cost is higher than premium and the octane is about the same as regular. Now they are talking about increasing the amount of ethanol. Lunacy!Anecdotal evidence suggests that using petrol blended with ethanol does not really provide any financial advantage because the vehicle consumes more thereby negating any advantage over petrol with no ethanol at all. The jury is still out on this but I personally do not fill up any of my cars with ethanol-blended fuel. And I only go to reputable petrol stations.