It is always best to refer to the Operator's Guide for your Can-Am for fuel requirements for your specific model and engine. For Spyder models, your machine will perform to its highest potential and best performance on 91-octane fuel with no ethanol. That said, you will not damage anything if you use 87-octane fuel with no more than 10% ethanol, it just won’t perform top its full potential. Ryker models perform well on 87-octane fuels. Do NOT use E15 or any fuel with more that 10% ethanol in any recreational vehicle as this will damage the engine.