When you say 'recommend' I assume (always dangerous, lol) that you are taking that from the page heading in your owners manual, as in 'Fuel, Oil and Coolant Recommendation' or similar. If so, I wouldn't class that as being THE fuel that Suzuki recommends, more one of the fuels they advise you CAN use.
If you look at the attached (from a VX800 manual, but I'd bet this page is fairly standard give or take a few words for Suzuki manuals) you'll see that under the heading of gasoline/Ethanol blends the wording is 'may be used'.
In fact after reading this page a few times what i get from it is that Suzuki would prefer you use unleaded petrol with an octane rating of 91 or higher, though you 'may' use any of the other fuels listed without issue.
Personally I prefer the good old fashioned stuff in preference to Ethanol blends or similar, but more due to the fact that I don't like pseudo green stuff like bioethanol or hybrid cars which seem to exist more to give Hollywood stars and the like a holier than thou attitude over us mere peasant fossil fuel users, while totally ignoring the disastrous effects their supposedly green transport methods/fuels actually have in the real world....but I am digressing
At the end of the day, if your manufacturer is ok with it and you like it then go ahead and use it!

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