I feel so, so SORRY for you with your rip off fuel prices.
Here in the UK we are LUCKY we only pay about $6.37 for a (small US, not imperial) gallon of unleaded. (There are regional variations and the price is currently falling. Can you believe it was even higher a few weeks ago!)
My manual (03) says 91 Octane minimum or 87 in Canada. no mention of the US. Unleaded here has a minimum 95 Octane.
And don't forget there is more than one way to present the octane number, so you might not be comparing like with like.
The UK uses RON, and the manual mentions 87(R+M)/2 for Canada. (Motor and Research numbers).
And 95RON just happens to be equivalent to 87MON which is no doubt the why riders in the US can use 87 octane.
But the bottom line is, can I afford to go out for a ride? :-)
Steve