Originally Posted by kschachn
Yep, to say "No ethanol in Shell V Power" is only for that location and only for that particular station. Elsewhere it may be different.
Yes, quite true. It depends upon jurisdiction. In Canada, most provinces, and I can speak for Alberta, Saskatchewan, Manitoba, and Ontario with at least some confidence, require that gasoline be sold on the basis of a certain percentage of ethanol averaged over a certain amount of volume sold. The way that works out, regular will be, without exception (except perhaps marinas; I haven't been boating for years), be E10. Midgrade will be blended, like the sign says, and 91 octane will almost always be E0. The few places that sell a higher octane number premium in addition to 91 will sell that as an E10, too.
Considering that regular sells the most by far, the minimum mandate is readily met by that. I believe the mandate aggregate percentage is 7.5%, so if everyone switched from premium and regular to midgrade tomorrow, they'd still be fine. If everyone jumped to E0 premium tomorrow, a wrench would be thrown in the works and Saskatchewan stations would have to change their formulations.