Toro Power Equipment generally recommends the use of unleaded gasoline with an octane rating of 87 or higher for their engines. This fuel type is suitable for most models. It is important to ensure that the gasoline you use does not contain more than ten percent ethanol, as higher ethanol content can lead to performance issues and possible engine damage. Additionally, for optimal performance, users should avoid using fuel that has been stored for more than thirty days, as it can degrade and cause complications in the engine. If an engine operates under particularly demanding conditions, it may be advantageous to refer to the owner's manual for specific fuel recommendations tailored to a particular model. The owner's manual can also provide valuable information regarding maintenance and fuel storage. For accurate details regarding a specific Toro engine, checking the official website could provide further insights.