No, I know the spyder will run on it, and I get the no Ethyl in all octane, if it is available. Just in the higher altitude, towing the trailer up steep grades, I like to run the higherr octanes.
Actually, you would get better power at Higher elevations with the lower Octanes. For the most power and highest fuel mileage, run the lowest Octane as long as you don't have Detonation or pre ignition. Basically higher Octane fuel burns slower, slower flame front and is harder to ignite than lower Octane. 'Premium' is not a 'better' or higher quality fuel than regular. The higher elevation and the cooler the weather, the lower the Octane requirements for optimal performance, both power and mileage. This only holds true for naturally asperated engines, ie no forced induction, super charger or other wise.