The Earthquake 31285 Pioneer Tiller is powered by a 4-cycle 99cc Viper engine. Let’s break down the fuel requirements: Fuel Type: It runs on unleaded gasoline (also known as petrol). You don’t need to mix oil with the gasoline; straight unleaded fuel is sufficient. Oil: Unlike 2-stroke engines, which require a fuel-oil mixture, this tiller’s 4-cycle engine has a separate oil reservoir. You’ll need to check and maintain the oil level according to the manufacturer’s instructions. Maintenance: Regularly check the oil level, change it as needed, and ensure you’re using the correct oil type specified in the user manual. Remember, it’s always best to consult the official user manual for precise instructions on fuel and oil requirements for your specific Earthquake 31285 Pioneer Tiller. Happy tilling!