With running the risk of ticking some people off...
You pay $20 to $30k for a vehicle and consider using something other than what the manufacturer (engineers) recommend? :banghead:
There are reasons why fuel octane ranges are recommended -- however, having said that, I'll bet a case of beer there will be someone post on this thread with a long list of reasons why they know best and use whatever they want in their Spyder, and that it is better than the manufacturer recommends. :roflblack: Just another reason I do not buy used vehicles.
Most people do not even understand what octane ratings mean. Some believe the higher the octane the better the fuel; which cannot be any further from the truth.
Octane has nothing to do with the quality of the fuel; as so many uninformed seem to believe. If it did then everyone would use "rocket-fuel" in their vehicles.
In the most of layman's terms, octane relates to the "burn-rate" of the fuel; and various engines require specific burn-rates to work properly as designed to get the most from the engine and prevent damage over the long-term.
Use what the manual says to use... there is a reason they provide the suggestion.
Again... another reason I do not buy used vehicles.
Sorry if this ticks anyone off or offends them...