We recommend using Generac 5W-20 GEO Full Synthetic Oil for your home standby. This oil is made specifically for gaseous engines, such as the one found in your home standby generator. Using this oil helps prolong your generator’s life and protects your investment. This oil is suitable for cold and warm climates. For portable generators, we recommend using Generac 5W-30 Full Synthetic Oil. This oil is suitable for warm and cold temperatures.
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